Trying to figure out what combo I need to use for this stereo headset to get some nice surround sound going. I have a small budget, sound card+amp should be under $100. I have my eyes on the Asus Xonar DX sound card but realized that I need to have an amp with it. What I'm thinking is, could I possibly use a home theatre receiver as a headphone amp (Yamaha V565). If what I'm thinking is impossible, what headphone amp should I get?