Currently using an aureal sq2500, which is comparable to the soundblaster live, i think. Soundblaster came out with some new cards, do you happen to know anything about these? As my card is no longer supported since company is defunct now. After looking around there are a few other products...

I had the opportunity to borrow a friend's hd580's for a weekend and dispite how amazing they sound they revealed the limitation of a pc system. When playing mp3's or cd's there is this low volume but somewhat high pitch sound that is percistant. Also, moving my mouse, opening/closing the cd...