i had an audigy 2 zs platinum, the only thing i liked specifically about it was the front drive, which was very nice.
however, it's output was much less than i expected from such an expensive card, to the headphones i was using, and there were always noise issues.
basically my point is, that PC cards are PC cards, so just get an Audigy 1 and be done with it. i think they are like 30$.
if you don't need the surround sound, then don't bother, IMO.
btw, i benched back to back with an audigy 1 and audigy 2 on a variety of different programs, and was not impressed with the difference it made.