"About two weeks ago I ordered the Chaintech 7.1 Soundcard for the ridiculous low price of about $19 at BananaPC (it is out of stock now) to upgrade the stock soundcard in my 2002 Media Center PC. Ever since I've connected my HDTV TiVo to my Onkyo HT-R510 I've been enourmously impressed by the improvement in the sound quality going through a fiber optic cable vs. the old analog connection. So I figured buying a new soundcard for my MCE machine for a mere $19 that supported fiber optic out was a no brainer. All I can say is wow -- my mp3s have never sounded this good. The improvement in sound quality going through this card and the fiber optic connection to my Onkyo is amazing."I have had optical outputs on my sound card for a long time and my iRiver supports it too, but I never bothered using it on a regular basis, only briefly for a test. Do any of you use optical I/O for audio on a daily basis? Have you found the sound to be better than that over copper?