lol @ "audiophiles" in here.
I bought an Auzentech Prelude 7.1 when it was on sale to replace my onboard Intel HD Audio. I had my audiophile neighbor come for a comparison. I first put the onboard on, and then when it was time to switch, I plugged it back into the onboard. He claimed he heard drastic differences. The soundstage was much wider, the highs were clearer, he said. Placebo is a helluva effect.
I would recommend spending the money on better sound reproducing equipment. A $200 set of headphones is going to sound VASTLY different than a set of $100 ones. I would not recommend getting a sound card of this price unless you plan to hook something that costs ~$500+ to it. You'd simply be much better off getting better audio equipment.
Although, I must say $47 is a smoking hot deal for this card.