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I purchased a 2012 GSA in June. Although I have not ridden it as much as I'd like, the BMW is a quality machine and the one I chose after years of dual sport research and hand wringing. I don't regret it. I've worked on and built numerous bikes with factory and after market parts. The Beemers have their good points and bad like all the rest, quality of parts is among the best in the world. It boils down to inseam, terrain, load, and endurance. Sort out how you want to use the bike, your physical limitations, if any, and that will help narrow the choices.
Enjoy the search. The start of a journey is sometimes the most exciting part.