keeping the 6 as well?
if so, aprilia futura is the way to go. dead-reliable motor, great windprotection, comfy. there's a mille hidden under the saddle bags. seems great for a passenger. my friend has one and he loves the thing. at first, i thought it looked silly, but in dark blue it's quite attractive.
the vfr800 is another choice, but the futura just seems way cooler to me.
cheaper yet, the kawi connie. check out cog.
selling the 6?
i think you know the answer...can you say "hello busa"...make that hayabusa.
yeah, i know that's not funny.
the bandito sounds interesting. as does the zxr1200.
but if the 6 is gonna, a zx9r might be a good choice. comfy, but still a sportbike.
and of course the vfr kinda makes this list as well. it does sportbike things too.
the aprilia falco or futura, look at which is better for you.