Hydrostreamforums.com - The only dedicated Hydrostream forum

Don't worry about a big sound system and all that right now, Your charging system won't like it anyway. As far as interior if you wanna go to buckets with a bench in the back. You could find a universal that would fit or you can get Hydrostream to make you some, either way it's gonna cost you.

you can get a really affordable sounds system for a couple hundred. just a basic radio and cd player plus 2 or 4 speakers from a bass pro shops or west marine. I never bought one my self but im sure they will make sound for you. If you want a bench seat in back, you can make one oout of ply wood, and get marine vinyl at a crafts store. grab some foam there too and take your time. no doubt cheap, and you will take care of if knowing you made it