Have you ridden any of the new fuel injected inline 4s? I had a 2009 R6 for awhile, and the top end on that bike was flat out violent.
I heard that from a friend that rides a Suzuki Bandit. It has the 'busa engine without the race bike looks. He went to the Bandit from an old Yamaha RD500 and says the new bikes are insane.
I'd love to get on a BMW S1000RR but I know its not a wise idea lol.