Which games do you play?
If you are big in to CounterStrike(or any of the HL games), you want to stay away from the Cat 3.2s. If you are into Freespace at the moment, then the Cat 3.2s are the only ones that work flawlessly. Some older games don't seem to work properly with either the Cat 3.2s or the Cat 3.1s(NOLF, KPC, Sac). Depends on what games you are playing what drivers you want to use.