I have been running my computer on a GA-7S748-L, the onboard audio is a Realtek 5-Channel audio, adn I cant stand it. I have a 600W speaker system, and im a bit of a stickler for sound quality, so I got an Audigy 2, and is a nice card, exelletn quality. I am upgrading to a GA-7NNXP, which has...