Well the only other thing anything like what you have described is a modded X-Box. Once it's hacked you can run X-Box Media Center which is, frankly, awesome. It's the best Media Center I have ever used. You can swap the DVD drive out if you want for a more compatible one. It plays most audio and video formats, including DivX and xVid. You can upgrade the hard disk, network it, play stuff off discs, use a remote with it and lots of other cool stuff.
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moto