I've asked this question before...looking for a 19", black case that has support for at least 2 PCI cards (one for TV out, and one for Digital SPDIF out), plus built in Ethernet. Throw in a hard drive, a CD rom, and a remote control keyboard, you can enqueue stuff on your TV, and jack the whole thing into your HT (although you probably don't need a digital connection for compressed music...but I'm a snob, so why not!)
Miss? Multipass.