Isn't there another practical problem with this configuration? I've thought about putting my A2 and my Revo into the same box, but one of the benefits of the Revo is supposed to be its superior DACs which requires using the analog outs (this would allow listening to MP3s in surround mode, for example). Similarly, I'd love to use the A2 to listen to DVD-audio which also requires using the analog outs. Very few receivers or preamps have two sets of analog inputs which would negate, for me, the benefit of having both cards in the same PC.
You could buy a Zektor multi-channel audio switch from Digital Connection for about $400, and then hook both cards up to a receiver/pre-pro but that seems a bit steep for marginal added functionality. Has anyone found another solution to this?