I'm guessing this is your first boat in general
@Steve B71 !??!
First things first. Get your safety items, fire extinguisher, and an anchor lined out. Next up is dock lines, bumpers, and other items you'll need to dock the new float toy. After that, it's all about what you're using it for. Some people have tons of money in the stereo, some in watersports equipment, others just cruise around and don't have much added.
The easiest way to know what you "need" is to use the boat. Get some hours on it, and you'll QUICKLY realize the things you want to improve. We added storage access, and accompanying totes/bins to help keep things easy to get to. We got special coolers for the boat the slide under the seats to keep the deck clear. We added a sound bar to the tower to throw some sound out behind the boat while swimming/anchored. I added an L13 Cone, and ribbon delete to improve performance consistency. Some laundry bags to keep spare rags and dock lines in. Added a spare tire and carrier to the trailer for towing peace of mind. Added a phone mount and stereo control to the helm area. We keep a large umbrella (anchor shade II) on board to create shade for those that want it. Tons of toys for our young boys, including an RC boat. Several "water lounge chairs" that inflate for floating around. Added a flag holder to the tower a few years ago.
Things that are still on my "to add" list.
- Stern stereo remote
- Grill and stand to stern area
- Subwoofer and Amp
- RideSteady GPS Speed control
- New "no stretch" wake rope and handle
The more you use it, the more you'll figure out what it is that you need/want to add. You'll see other folks out there doing a thing and want to try that, or possibly avoid that, and you'll figure out what additional equipment you want to add/remove.
Good luck and be safe out there!