Sound is what kept me a top player in CS.
I use EAX with 5.1 sound...... All I hear is one teeny footstep by mistake of the other guy and you are dead my friend.... I don't play CS anymore though.
(ISF Unit 5707) Arc Angel
was my handle on Counter-Strike.... I only played 1 player who beat me 1 on 1 score was 18 to 16...... but he had the same setup and he was really really good too.... he was cool.
Without positional sound it's much harder to suprise your enemy and use effective tactics...
For all you who think positional sound is not a big deal.... then please keep thinking that... The fewer of you there are the better we are
As for the guy who asked about what he should use, I recomend EAX, can't you live with a little distortion? If your competive you would be smart to use EAX, if you don't care and just play purely for fun, then use A3D.
Just my opinion.