Yeah, I think I mentioned somewhere in this thread about having an Audigy FX. I went with
this motherboard. The crossfire setup is what's screwing me up, because the 480 is blocking one PCI slot and there is no third PCI slot on the bottom and I can't use that bottom slot for my video card because I doubt it would fit (and even if it did, I'd have nowhere for the fan to blow out). In retrospect, I should have probably thought harder about the positioning, but oh well. Not worth getting a different board over it. I'm not super fussed about it, though, precisely because I think I'll be alright with the onboard sound.
This is what the custom case looks like, but now that I think about it, Aerocool screwed up by using the black top panel. They have an all-white case, so they should have used panels from that one to put mine together.