I bought a used 2006 R1200RT last month, and I've really been enjoying it. I had been waiting on BMW to release the F800GT, but was rather underwhelmed, to say the least. I was a little nervous about the seat height of the RT, but it is so well-balanced it is completely not a problem.
I've been riding since the Nixon Administration, and commute every day, rain or shine on the bike. I just love it.