One of my departments wants a couple conference-room computers. They want small, quiet, and able to play DVDs and possibly Blu-Rays (for future-proofing). The computers will be hooked into HDTVs (don't remember if they're 1080p or 720p units), and I'd prefer to just use HDMI cables for video and sound, to keep things neat. I don't think they have speakers yet, but they may add some at some point. It will only need to be fast enough to play video.
Can someone recommend an OEM computer that can be easily adapted to this use? Failing that, I'd consider a barebones unit that I can spec out myself. Don't worry about which OS an OEM comes with, because we've got a Windows site license.