@Columban not sure there is a best. There are different very good models of the different items you are looking at but individual use cases, water, dock, etc. Change from person to person. The fenders I use I think are the best, other members think others are the best. Same as with mirrors.
I would start by searching here for one thing at a time and reading the threads which will start you to form opinions and specific questions. Additionally, you will need safety equipment. If you are boating in larger lakes or the Ocean, things like VHF radio with a backup etc.
The list is endless so it is best to start with one thing, research, ask questions come to a decision, order it and go onto the next. 2021 AR210's haven't shown up at dealers yet so you have some time, but hopefully soon.
Here is a list of things you will need or want, next to each is what I have purchased, not necessarily what you should. I have everything below and a lot more, but these are things that should get you thinking. I have a 2020 AR210 in blue. Further more if you are going to do your own oil changes you will need a siphon pump. Some use electric, like I do, some do not.
You have to decide what you want and need, the list below is what I did... And it grows weekly. Almost everything here I have found on this forum.
1) Fenders - some use Mission some use standard some use balls.
Amazon.com : MISSION Boat Gear Sentry Boat Dock Fender Bumper (Almost Black) : Sports & Outdoors
www.amazon.com
2) Mooring Cover - I got my from dealer about $800 after discount.
3) Better Trailer Jack
Buy Ark Trailer Jack XO750 Black Edition Extreme: Jacks - Amazon.com ✓ FREE DELIVERY possible on eligible purchases
www.amazon.com
4) Trailer Guide Posts - lighted and covers
Buy Guide-ON Post W/LED Light 60" H: LED & Neon Lights - Amazon.com ✓ FREE DELIVERY possible on eligible purchases
www.amazon.com
Amazon.com : Post GUIDEON Cover Black 48" : Sports & Outdoors
www.amazon.com
5) Spare Tire Cover
6) Yamalube Spray Silicone
Buy Yamaha ACC-SLCNS-PR-AY Silicone Spray Protectant & Lubricant, Pack of 2 on Amazon.com ✓ FREE SHIPPING on qualified orders
www.amazon.com
7) Protectant Vinyl 303
Buy 303 (30382) Products Automotive Protectant - Interior And Exterior - Ultimate UV Protection - Helps Prevent Fading And Cracking - Repels Dust, Lint, And Staining - Non Greasy Finish, 16 fl. oz.: Tire Care - Amazon.com ✓ FREE DELIVERY possible on eligible purchases
www.amazon.com
8) Microfiber cloths
9) Pool Noodles for protecting cover
10) Docklines
Amazon.com : Predator (NZ Hi-Performance Dock Lines Bag Set (Navy) | 3/8" x 15' Double Braided Nylon Dock Line with 12 Inch Eyelet | Dock Lines for Boats | Ropes for Boats : Sports & Outdoors
www.amazon.com
Amazon.com : SEACHOICE Double-Braid Nylon Dock Line 3/8" x 20' 40271 Black : Dock Lines And Rope : Sports & Outdoors
www.amazon.com
11) Marine Sanitation Device (Porta Potti) - this one will fit on the passenger side and is easy to pull out use and take care of.
12) Oars
Amazon.com : KERDITOO Kayak Paddles, Boat Oars for Inflatable Boats, 1 Pair, 54in Adjustable to 96in : Sports & Outdoors
www.amazon.com
13) Portable VHF Radio - this one is one of the best.
Buy Standard Horizon HX890 Black Handheld VHF - Floating 6 Watt Class H DSC Two Way Radio: Marine Two-Way Radios - Amazon.com ✓ FREE DELIVERY possible on eligible purchases
www.amazon.com
14) Steering Fins Cobra Jet
Cobra Super Magnum AK-19 and new Super Magnum AK-19 DELUXE steering for 2019 and newer Yamaha Twin Engine Articulating Keel Boats
cobrajetsteering.com
15) Flare Gun
Buy Coastal Alert Launcher KIT: Fishing - Amazon.com ✓ FREE DELIVERY possible on eligible purchases
www.amazon.com
16) Tools for Boat - I got a bag and tools at home depot.
17) Oil To keep in Boat in case - Get the Yamalube Oil
18) Second Battery - AGM - review threads here, should have two of the exact same batteries.
19) On-Board Battery Charger
Buy ProMariner 44021 ProSportHD Series Battery Charger - 20 Amp (Plus): Automotive - Amazon.com ✓ FREE DELIVERY possible on eligible purchases
www.amazon.com
Buy NOCO GCP1E 15 Amp 125V AC Port Plug Power Inlet with 6-Foot Integrated Extension Cord: Extension Cords - Amazon.com ✓ FREE DELIVERY possible on eligible purchases
www.amazon.com
20) NOCO Boost Battery Pack
Buy NOCO Boost Plus GB40 1000 Amp 12-Volt Ultra Safe Portable Lithium Car Battery Jump Starter Pack For Up To 6-Liter Gasoline And 3-Liter Diesel Engines: Jump Starters - Amazon.com ✓ FREE DELIVERY possible on eligible purchases
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Buy NOCO GBC013 Boost Sport/Plus EVA Protection Case For GB20/GB40 NOCO Boost UltraSafe Lithium Jump Starters: Jump Starters - Amazon.com ✓ FREE DELIVERY possible on eligible purchases
www.amazon.com
Buy NOCO NUSB211NA 10W USB Wall Charger: Wall Chargers - Amazon.com ✓ FREE DELIVERY possible on eligible purchases
www.amazon.com
21) Vinyl Sauce Vinyl Cleaner
22) Vinyl Sauce Conditioner
Buy Boat Bling Condition Sauce Premium Interior Moisturizer w/UV Protection, 32 oz.: Leather Care - Amazon.com ✓ FREE DELIVERY possible on eligible purchases
www.amazon.com
23) Hot Sauce Boat Water Spot Remover
24) Sand Spike
Amazon.com : Slide Anchor - Shore Spike Loss - Large : Boating Anchors : Sports & Outdoors
www.amazon.com
25) Mantus M-1/M-2 Anchor
Mantus Anchors & Ground Tackle Mantus Marine Boat Accessories Mantus Dinghy LET’S RIDE Mantus Scuba & Compressor Compact, Light, Portable Mantus Marine Lights & Clamps Designed for Life on the Water Mantus Swivel The Strongest Link in Your Chain Explore Buy Now Mooring Snap Shackle The...
www.mantusmarine.com
26) Hi Visibility Anchor Lines I have two of theses for both anchors.
Buy Extreme Max 3006.2675 BoatTector Solid Braid MFP Anchor Line with Thimble - 3/8" x 150', Neon Green: Automotive - Amazon.com ✓ FREE DELIVERY possible on eligible purchases
www.amazon.com
28) On board inflater for tubes
29) Board Racks
Reborn Pro+ Quick Release Wakeboard Rack Polished,Reborn Pro+ quick release wakeboard rack is upgraded design based on pro quick release series. It can be installed at any angle and fixed at your desired position with 2 pins and can be released in seconds by loosing the knob. Mirror polished.
www.reborntower.com
Reborn Ocean Surfboard Rack Shinning Polished,This surf rack is built with very strong aluminum to store and display your surfboard. It's a new design to hold your surfboard tightly against your wakeboard tower, saving you valuable storage space on your boat.
www.reborntower.com
30) Sealable Plastic Containers for things in boat.
31) Navionics Subscription for Maps
Navionics mapping offers integrated marine content that details coastal features plus thousands of rivers, bays and lakes around the world.
www.navionics.com
32) Mount for phone on dash.
33) Extra USB Plugs for Passenger Side, You will have to install and wire
Amazon.com: Quick Charge 3.0 Dual USB Outlet, 12V/24V USB Car Charger with On/Off Touch Switch and LED Digital Voltmeter Waterproof Car Socket for Car, Marine, Boat, Motorcycle, Truck and More: Home Audio & Theater
www.amazon.com
34) Wrist band for Lanyard Kill Switch otherwise clip it to your vest.
Amazon.com: Yamaha Superjet SJ Waverunner GP XL VX VXR Raider LX SHO New Wrist Band Lanyard: Health & Personal Care
35) Throwable Emergency floatation
Amazon.com : Scotty #793 Throw Bag w/ 50-Feet of Floating MFP Line : Dock Lines And Rope : Sports & Outdoors
www.amazon.com
36) PFD correct type for everyone on board.
37) Proper ropes if towing large tubes 1-4 rider and quick connects.
Amazon.com : Airhead Tow Rope | 1-4 Rider Rope for Towable Tubes : Waterskiing Ropes And Handles : Sports & Outdoors
www.amazon.com
Amazon.com: AIRHEAD KWIK-CONNECT: Sports & Outdoors
www.amazon.com
38) Extra Bungee Cords
HORUSDY 30-Piece Premium Bungee Cords Assortment Jar, Includes 10”, 18”, 24”, 32”, 40” Bungee Cords, 8”Canopy/Tarp Ball Ties and Crocodile Mouth Tarp Clips - - Amazon.com
www.amazon.com
39) Two locks to put through holes in trailer tongue when you remove pin and fold for security.
Large 4-Position Combination disc Padlock Stainless Steel Rust-Proof Door Warehouse Outdoor Round Cake Tray Padlock Discus Lock with Hardened Steel Shackle Shelf Locker Silver Lock Gym, School, - - Amazon.com
www.amazon.com
40) Grease Gun and Marine Grease
Buy Lnchett Grease Gun, Professional Pistol Grip Grease Gun with 18 Inch Flex Hose, 2 Reinforced Coupler, 7000 PSI: Grease Guns - Amazon.com ✓ FREE DELIVERY possible on eligible purchases
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Amazon.com: Lucas Oil 10320 Marine Grease; Multi-Purpose;14 Ounce: Automotive
www.amazon.com
Buy LockNLube Grease Gun Coupler locks onto Zerk fittings. Grease goes in, not on the machine. World's best-selling original locking grease coupler. Rated 10, 000 PSI. Long-lasting rebuildable tool.: Grease Guns - Amazon.com ✓ FREE DELIVERY possible on eligible purchases
www.amazon.com
41) Fishing Rod Holders / Rocket Launchers - I have 4 - if you plan on fishing and trolling.
Amazon.com: Amarine Made (2X) Stainless Tournament Style Clamp on Fishing Rod Holder for Rails 1-1/4" to 2": Sports & Outdoors
www.amazon.com
42) Regex
Amazon.com: CorrosionX 61002 Rejex 16oz Bottle: Sports & Outdoors
www.amazon.com
43) Spare drain plugs - I have 3, just in case.
Buy Yamaha F2D-U2280-10-00 Drain Plug Assembly; F2DU22801000 Made by Yamaha: Oil Drain Plugs - Amazon.com ✓ FREE DELIVERY possible on eligible purchases
www.amazon.com
44) Spare flush fitting, I bought two and put them on plastic shut off valves.
Buy Yamaha OEM PWC WaveRunner/Sport Jet Boat Conduction Water Flush Fitting: Cylinder Heads - Amazon.com ✓ FREE DELIVERY possible on eligible purchases
www.amazon.com
45) First Aid Kit
Buy 220 Piece First Aid Kit with Hospital Grade Medical Supplies, Great for Home, Outdoors, Office, Car, Travel, Camping, Hiking, Boating, Every Emergencies. on Amazon.com ✓ FREE SHIPPING on qualified orders
www.amazon.com
46) Air Horn
Buy ETL Solutions 3.5oz Safety Air Horn - Very Loud - Ideal for Boating, Sports Events, Aggressive Animals - Value 2 Pack!: Sports & Outdoors - Amazon.com ✓ FREE DELIVERY possible on eligible purchases
www.amazon.com
47) We have one large oversize duffel bag that is water proof that we Pack everything in.
Buy DRY PAK Waterproof Duffel, LG, Blue: Travel Duffels - Amazon.com ✓ FREE DELIVERY possible on eligible purchases
www.amazon.com
48) Rear View Mirror
Buy CIPA 01609 Black Vision 180 Degree Marine Mirror with Deluxe Cast Aluminum Cup Mounting Bracket: Mirrors - Amazon.com ✓ FREE DELIVERY possible on eligible purchases
www.amazon.com
49) Telescopic Boat Hook with luminous End for docking or whatever
50) Two boat buckles for transom boat tie down - awesome.
Amazon.com : BoatBuckle G2 Retractable Transom Tie-Down (Black), 1 Pair , 2 x 43-Inch : Boatbuckle? Retractable Tie Down System : Sports & Outdoors
www.amazon.com
51) Trailer hitch lock - sucks if somone takes your hitch ball at the launch, seen it happen.
Buy Connor Trailer Hitch Lock - 5/8" Black Nickel Hitch Pin for Class III, IV, V Hitches, 1615190 Receiver Lock: Receivers - Amazon.com ✓ FREE DELIVERY possible on eligible purchases
www.amazon.com
