You’d be surprised how easy it is to build a really good gaming and video editing system these days. All you need is to pickup a cheap Athlon X2 based Compaq with a PCI Express Video slot at WalMart for as cheap as $300 and then buy a good $100 video card. That’s it, you’re ready to rock!!
Right now I have a Home made setup basically.
Specs
AMD Duron 1.2 GHz, 512 MB RAM(DDR but who cares since its only 512)
Nvidia Geforce FX 5200
3 - 80g HD's and 1T external