James do you realize the diff between a gixxer 750 and a crappy Fizzer 600?
Do yourself a favor and DO NOT buy the fzr600. If you weigh less than 180lbs, a gixxer 600 would be a fun bike. A gixxer 750 is alot of bike, damn near the power of an R1 (not a good first bike). Get ahold Of envy, have him put you in touch with me. CBR600 yes
R6 maybe
gixxer 600 yes
gixxer 750 prolly not
superhawk yes