I got the R just before the S came out, but I don't regret it. I'm already up to 7 RC's on it, and can see I'll pass 10 quickly.
I don't get all of the advanced features just yet, and the manual makes no sense, but I figure if I play with them enough I'll figure em out.
As mentioned, binding is super easy on the 3r, the model list & naming all your models makes it great to use. I really recommend it!
- Tony