I've also been interested in switching to non-RF when the time comes to replace tires. The dealer also told me (when trying to push tire insurance) that I had to replace the tires on the X3 with RF tires because of suspension settings, etc.
I changed to non-RF on the e90 and it made a world of difference - much better ride, quieter, etc. I think most people on other forums will tell you the same thing. However, I havent heard much on people making the switch on the F25... yet.