I am in the process of putting a new system together.[See components listed below] I need to add a sound card to this list (as I don't really want to just go w/ the on-board sound)-but I don't really know much about them. I would like a good solid card that won't give me too many problems (esp. w/ Win XP). I've been looking at the Audigy Platinum or the Gametheatre XP. Like everything else, I've heard pros&cons for both. Which do you guys prefer?!?