Josh

are you sending a digital signal from your Audigy? If so, it should be just fine. All it is doing is sending 1's and 0's. A 5000$ player won't send better 1's and 0's.

The one thing I didn't like about using my computer was the noise issue. Computers run much louder than a CD or DVD player. Try placing the computer as far away from your listening position as possible. Isolate it. Or get a really good noise proof casing.