the 600RR is a great bike, my sudjestion to you is go to a dealer & have a seat on the different 600´s and see witch one feels the most comfortable to you. they all have slightly different seating positions & you might like the way one feels better than the other. they are all great bikes. i have read great reviews on the kawi ZX6R, handeling & suspension. but go with what feels most comfortable to you. RIDE SAFE.