So I am looking at C14's (haven't found one to test), K1200GT, K1300GT, and the ST is still in the hunt. I tested an FJR and although the bike was a great performer, it felt just a little too small for me (I am on the big side of large). I really like the BMW. Expensive? yes. I did see that BMW of Daytona has a couple of K1300GT demo's with the Preferred package going for $16,500 with like 2000 miles on them. So that is not terrible.
The cost of maintenance scares me a little but then so does the quality of the Honda dealers around me. The ones around here rarely see an ST and the quality of the mechanics are, well, mediocre at best. The BMW service guys seem like pros.
Ultimately it is a personal decision as to what fits you and your style. I haven't made up my mind yet but in the mean time I am trying to pile up :money1:
I think just getting to the engine on the GT is gonna be more expensive (like the Honda) if you don't do it yourself. The nice thing about the RT is the boxer heads are easier to get to for the valve checks.