The newer models are more difficult to work on than the 2.3s, but very doable. So far, I've done the 10 and 20K services, including swapping some shims at 20K. The manual is pretty good, but there are a few things I've come across that I had to figure out on my own, or weren't mentioned at all (as with most manuals).
I went from the R1200RT to the first of three Rockets and, although the RT was a great bike, I haven't looked back. I don't think you'll regret it. This is a great forum for support, so don't let the maintenance procedures stop you. If you have a specific question now, let me/us know.....