I built (or rather rebuilt) Satyr a few months ago as a Home Theater PC. At the time though, I didn't have adequate hardware to run Media Center Edition (it requires a video card that supports DirectX 9). The poor box was only running a Duron 700 though.

With the money I got for Christmas, I picked up a GeForce FX 5200 (~$50), the cheapest nVidia card that would support MCE 2005. I also installed an Athlon processor I had lying around, although it will only run at 1100MHz because the motherboard won't support it at full speed. Eventually, the machine will be upgraded more, but I don't have the money to do it yet.

The odd part of the experience was that I'd done something to make the machine fail after switching hardware out. I ended up needing to reinstall the OS to make it stable again, but it's running fine now.