Aha... after examining the X1200 more closely, I found a possible dealbreaker for those of you who want to use the X1200 exclusively as part of your HT setup: no SPDIF output. You're stuck with HDMI.
The socket is there, which is why I didn't notice, but it's blocked. When you try to push in a cable, the cover doesn't swing out of the way. Only option is to purchase a separate card like the Sound Blaster Audigy.