Do they allow any test rides there now, or is the weather killing it? I went to my BMW Dealer near my house about 7 miles down a really nice regional twisty road...made for bike test rides. Rode a C650Gt HOME and back, and later, when he got in a Demo C600Sport, did the same with it. Very different (for me) feel to the two of them:
1.) more aggressive riding position on the C600, lighter and more "flickable", pretty aerodynamic and shod with really responsive Pirelli Diablo tires. (LOVED it!)
2.) more upright, cruiser-like position on the C650GT, heavier with Metzler tires, pushes LOTS of air, and not as lithe as the C600. (Ho-Hum...)
Gonna mostly commute, get the C650Gt. Gonna get out and have fun on the weekends, get the C600. BIG difference between them.
Here, the C650GT outsells the C600Sport 2:1. In Europe, it's almost 3:1 in favor of the C600Sport...mostly to Tmax owners!
Get test rides!!