I have a CBR 600 RR 2006...Great value for your money. 2007 is a total rebuild they say, well, for the price and about 5kg shedded, you might get a quicker ride. But unless you want to improve your track times by split seconds, you wasting extra money and won´t even know the difference. Rode one me self. Most reliable and better looking than the GSX-R 600.Infact, the suzuki´s are a dime a dozen...Now the 750 gixxer is another story. Picks up speed faster and you don´t have to wait all that long before your you feel the power, you get all this at earlier revs compaired to all other 600´s (especially the R6) across all manufacturers. The Triumph daytona 675 is another option close to the 750...Almost everyone that has one doesn´t want to sell. Compaired extensively to the 750 and looks great...Little more scarce and the aftermarket parts are slightly more expensive when compaired to all the more comon Japanese makes. The mass on the bike(07 model) is under 150kg and this is a big plus on the track and general handling. Good luck on whatever you get...let me know though whatever your choice is. I´d love to hear how you feel. Personal preference plays the bigest role at the end of the day...you goda love what what you riding and don´t base it solely on other peoples view.