i have only ever owned stand ups and boats,but imho buy a standard one as tuned ones are troublesome.i have had many js 550 sx's and 650's.buy a seadoo with a rotary engine,get used to it and then tune it yourself,so you can go as far as you like without compromising reliability.also make sure you buy one with low hours and service history.do your research and ask them about how they used to clean it out after taking in the sea which is very important.they need to be flushed out and cleaned after every time out,obviously because of the salt water.great fun tho