heehee. Guess this'll learn ya to ask this kind of question of a computer geek site.

Here's what I'd do. Buy a new box. I did the 80% upgrade thing with new MoBo, CPU, box, etc. That was o.k. for a while. But now I'm itching to drop new stuff left in my old box to add yet ANOTHER computer to my home network. It's like a couple of people have said, if you get past the 50% parts upgrade....just drop a little more change and get a whole new machine.

Oh...and you better be careful or you'll end up with a bedroom or basement dedicated totally to your 10 computer network, all running different OSes! it's an addiction.