Hi, I have a great sound system in my living room, but i find myself listening to a lot of my music in front of the computer now. I own a pair of hd600's, a creek obh-11 headphone amp w/ upgraded power supply, and a creative audigy 2 nx as a sound card. Should I change my sound card? Are there any "audiophile" computer sound cards out there I should be aware of that will sound better than my audigy2 nx (because of course it doesn't sound as good as what comes out of my system)? Thanks a lot!