I grew bored and disillusioned with my GSX-R750...it was really only "fun" when doing stupid things....on the street anyway. I sold it and bought my Suzuki M109-R as a compromise....a power cruiser...tons of power but more cruise friendly ergonomics....I've happily ridden the mountains of Arkansas numerous times...it's comfortable there and back again....and handles well in the twisty mountain roads for a big bike.
I'm looking at a new Kawasaki Concourse for this Spring as my riding interests have evolved into longer more over the back road type trips....we'll see. I may try one of the longer trips on the M109-R before making the decision.