650s are good. more than enough power for fun, especially if you're just getting started. 701 gives you just a bit more power everywhere. but still very "street-able", if you will.... crazy, to me....would be 800+cc, heavy porting, water injected exhaust(the kind you can adjust), high compression, 148mm pump(144 is stock) with magnum stator(what would be the bowl on a berk), larger nozzle, light lay up hull. a ski like this....will make the tears run out from your eyes....may even give you arm pump from hanging on. it may also be super touchy on take off.....like if someone pulls the carpet out from under you.....haha...
ive got a buddy whos a yamaha mechanic....i just described his ski. my initial thoughts on my first ride on it....."WHOA!!!" "SHHHHHHHHIT!"
Wasnt expecting how hard it pulled. had no problem hitting 58-60mph, like right now.
but....this was expensive. far more than 2k. stockers are good machines. very simple to maintain. also, if you see one for sale, without a trailer....dont be scared. 2 guys can easily load/unload these. the wife an i have lifted ours many times. or, i can make you some bunks that will fit in the bed of your truck....that would slide out and tilt to launch ski.
good times