1150 vs 1200 GSA
I do hate these subjective questions as answers are so biased, and how can they not be?
I have owned both. I rode the 1150 2-up across China a few years ago, cleaned the air filter. Just put 17K miles on a 12GSA this past 12 months and just returned form Prudhoe, added gasoline. Again 2-up. I never liked the 1150 because of its weight/balance feel, and never like the 11xx engines.
I love the 1200 engine, and the balance of the bike; even with that big tank, the ABS/linked brakes, tranny, unreal torque. I feel the design of the 12 GSA gives the weather protection of the RT, and the handling of the S. It has been amazing and I have been impressed, with its reliability. Yes, its still new, but it has recieved some abuse, and took it well. Did I mention how great that engine is!!
Off road, get a 950, they are tops, but don't go too far from home! I have never felt the GS a great dirt bike. But for long distance adventuring and reliability, they're tops.