I have a motocross background so the fz6 is great bike and I may end up keeping it but I wanted to see with the next step up in performance is all about. I rode the 06 cbr f4i today... Amazing bike. First of all the ergos on the f4i are not much less in comfort than the fz6. Yes, itwas a little more leaned but no where near an r6 or cbr600rr. The ride is very tame and smooth until you twist it and the cbr comes out of it. Deff faster but not crazed ready to rip throttle. It rode like the fz6 just a bit more agressive and a bit less touring, but yet still can be considered a sport touring bike based on comfort. The cbr sure sounds a hell of a lot better, both with stock exhausts. Both are really nice bikes and Im not sure which way I will go. The fz6 is a bit more comfortable but the cbr is a bit more fun. Not by much in either direction.