Why buy new? You're going to drop it at some point anyway, despite the fact that you're a seasoned dirt rider.
Find a 2 or 3 year old sportbike that somebody didn't ride much, save a bunch of $$$, get more motorcycle, and don't take the depreciation hit.
FZ-6R would be my choice out of the bikes you listed, but if you're already an accomplished dirt rider used to riding hi-performance motocross machines, that FZ is going to get old, quick. You are going to want more motor.
My 2 cents.