The Zin mages all have AMD 3200+ or so single core processors and 6600 GT video cards. A gig of ram.... nothing too fancy as WoW is not a real intense game.

Xzin had until recently a 6800 Ultra video card and a 3ish ghz Extreme edition processor - also a gig of (pretty quick) ram. 2 Raptors in raid. I recently upgraded Xzin to a 7950 card.

My new boxes (not sure if I will use them for the warlocks or what) consist of 2 gigs of memory, AMD Athlon 64 5600+ 2.8 Ghz Dual cores, Geforce 8600s, and a mid to high end micro atx mobo. They have everything I would need to run the Zins on - sans video card - so why not save some space?

All of my computers have battery backup and redundant internet.

Honestly, under a gig of ram will cripple you in large fights. Get at least a gig. The next major bottle neck is the video card. At least a 6600 GT - perhaps a low 7 series is great..... avoid the 7200 as it sucks and avoid any integrated graphics because they also suck. The processor is nice but WoW is not a real intense game. Single core AMDs are dirt cheap and while they are not top of the line, they are good processors at a damn good price. Hence using them in all of my "Zins".

My new Xzin box is a beast. 3x 8800GTXes, Quad Core Extreme Edition, ultra high end motherboard, 4 gigs of ram, raptors in raid (considering going DRAM solid state), etc etc.

A bit more of a verbose answer than you perhaps requested but the bottom line is that any "decent" box can run WoW no problems. I think I spent about $400 per my newest Zin boxes.... and thats a bargain compared to what the last ones cost - and the new ones are quite a lot faster.

Not that it really matters - both will be able to run WoW at reasonable settings or better at max fps.

Don't forget to defrag your drives from time to time though.

I hate to knock AMD because I am a shareholder but their linux drivers SUCK. I don't buy AMD video cards and I can't at this point in time suggest them. Interestingly enough, I also own Nvidia stock. They were both pretty compelling buys a few weeks ago