Bump up for ya. I just came over to Anand to research the same thing myself. I have managed to find out that the nForce2 boards are pretty cool, especially if you are hooking up to a audio receiver. I guess the nForce chipset can put out the digital SPDIF audio in 1 cable directly to the receiver, and that can carry all of your 5.1 audio. Again, I'm just telling you what I've managed to read over the past day or so.
Good luck. I'll be watching this thread.
Aaron