That had occurred to me. I kind of want to do it in phases, though, and going the USB route would mean buying a new SATA HD and installing the operating system on it at the same time as everything else. (I don't currently have any SATA connectors...)

Ooaaah. this appears to incorporate all the above features as well as gigabit LAN and six channel sound. That may be the one for me...

EDIT: Wait, never mind, this isn't just a list of compatible processors, there's a big fat 'NO' down the side against all the Core2 Duos. Never mind.