well personally i would stay with PR for these reasons:
A. i can play PR, bf3 has so many issuses that i cant even play and thanks to the web browser (WTF is with that) i cant even play online.
B. teamplay: i feel even from playing the beta and playing BF3 at mates that there is no where near as much teamplay as there was in bf2 and certinally not compared to PR
So yeah, what would you pick and state your reasons!
. No but really I enjoy BF3 quite a bit, more so then PR right now.