You gotta go on what your likes and dislikes are. And no gixxers are NOT comfortable. All of the makes and models have there pro's and con's. The reason he 636 is over powered to the rest of the models is because it has more displacement, hence the "636". Being a former Kawi owner I like them, but they are to my riding style. I had an R6 and didnt like it, to flaky through turns for me. Had 2 gixxers and fell in love. It is all in how you wanna ride. The gixxer is a more aggressive riding style, making it less comfortable but better feeling when your running hard. You just have to take a ride on a few different makes and models and see what you like?