I have a 2008 V and a 2005 R1200 GS. Totally different rides. I've been trying (not too hard) to sell the V, even advertised on here, with no luck. Everytime I ride it though, I'm glad I still have it! I customized the seat (really uncomfortable for me before) and have Speedy's lowered footpegs. With those mods, a much better bike.
The V is quicker, buzzier, and obviously lighter. Better mileage, no maintenance except tires in the last 4000 miles. 11,00 miles total and previous owner had no maint issues.
The GS is more stable at speed, not as quick, but more powerful, and a smoother ride on rougher pavement. 99% of my riding is paved, so no comp, there. Hands down choice for a long trip and better luggage, also.
I guess that I have a wandering eye. I'm drawn to the 1050 Tiger, but also the Concourse.
I need to win the damn lottery...
edit: I test rode the F800. Nice bike, but a seat like a 2x4!