a cheap soundcard?
Xonar DGX or another Xonar card is great for the price. There's even $10 off right now through rebate. I have two DGX's sitting next to me, and while they underperform for gaming (Dolby is very bloated), they are a great upgrade to onboard audio for music listening. More power, easy drivers, microphones sound cleaner, more detail, and a bit quieter.
Purple beat me by 16 seconds. C'MON!!!