I?m not ?stuck? on XP. I got it for free from someone who won it attending a MS event so the cost is the same as Linux. I don?t really care about extra features, I don?t even use everything the XPMCE can do. All I use it for is playback of pre-downloaded content and mp3 jukebox. I can sit down on the couch after work grab my $20 MCE remote, browse my content and fire up something to watch. The interface (both app and remote) is so simple the GF only needed 5 min instruction on how to use it.
My current MC is a dual core Intel with 4GB of memory in an Antec 900 case with a Gigabyte mobo that has 8 SATA connections on it. Given that it is overkill I want to install a couple of 1TB-1.5TB drives and maybe WHS on it and slim down the massive piece of equipment that has to sit next to the TV.