I think most folks are voting for PR3's - not sure if you can get many PR2's any more. I voted PR3's based on pretty good experience with my set for ~1600miles so far. The rear started to noticeably square off by 700miles or so, but no noticeable detriment in performance. To Vireo's question, I've not had any problems so far. PR3's seem to polarize folks round here though - you either love them and the way they feel, or you have dreadful experiences with multiple flats.