Not sure why, but the thread reminded me of this. Intel vs AMD video
http://www.youtube.com/watch?v=XgOmMAasqto
I was a AMD fan until the K62 chip went outdated, since then I haven't had very good luck with them. I would check into an Intel C2D if you want a new setup.
If your interested, I just picked up 14 computers last night if you need a cheap replacement. A few of them are spoken for already but I should have a few left. There Dell Gx270 2.4ghz Pentium 4 with Hyper-thread 1 gig of memory and 800mhz FSB, they all have legal copies of XP Pro and I'm not sure of the hard drive size. I leave for vacation Saturday morning so if your interested I could put one together before then.
If not I would check Newegg.com like the other guys said. I've also seen some decent deals in the weekend newspaper ad's.