+1 vote for a thundercat!
I've used jet skis and thunder cats and they just don't compare.
A thundercat is better in every sense for fun, waves, costs, practical and unique.
You can still use it as a normal boat but explore more places, be rougher with it, sun bathe on it, fish, eat food, dump it on a beach, take mates with you.
Then when you want to race around it turns into a proper piece of well engineered race machinery!
I'm currently building my second boat. Don't think I'd ever own another normal boat. Mines made with a carbon fibre nose cone & floor and is also made from Hypalon.
A mate also owned a Gemini cat which was pretty good. Not as racey and a lot heavier but still a great bit of kit