I'm looking to replace my cruddy old G430's and was looking at Sennheiser's website and found the HD6 Mix headphones and was almost set when I realized that on-board audio probably wasn't going to pair well with them. I'm pretty set on that choice unless you guys have recommendations for a better pair for ~ the same price. What I really need help understanding is what sound card to get. I have no idea how to look for sound cards and what is good, so if anyone has a recommendation for a not super expensive sound card that I can get, I would be very grateful!