I'm looking for a good USB sound card with 5.1 out. Something like the Creative AUDIGY and has compariable sound quality of my Turtle Beach Santa Cruz (24 bit). The reason I don't want the AUDIGY is because I've heard it eats up resources. How bad is it? I have a PII 600, 192MB that runs extremely smooth. Runs MediaCar with MP3 + GPS + Netstumbler without any hiccups. How hard of a preformace hit will I get?