I think my F4 is very comfortable for a sport bike-that's one of the reasonsI got it. I'm only 5'8 so it fits me well, but I could see how a taller rider might be a bit cramped on it.

The Honda 919 is a bad *** bike from what I have heard and they look cool IMO. It has a slightly detuned 900RR engine in it and they are somewhat cheap to buy. The 599 has the F3 engine in it and looks cool as well.

 

I have an 04 VFR that is soooo comfortable. However, I used to ride it at the canyon before I got the CBR. It could hang with anything I came across. It is very capable, yet comfy on the highway. The engine has so much low end torque that you think your on a litre bike, and yet your sitting up like a standard.