HELP: Doom III machine

do you know what cpu can handle Doom 3 at 1280x1024 without jerkyness when all the monsters come out to play?

how about this?
http://hothardware.com/viewarticle.cfm?articleid=701&cid=1
(scroll down to bottom)

carmack probably has a AMD Athlon FX 57, Geforce 7800GTX SLI (x2), 4 x 300GB Hard drives on RAID 1,
4GB Low Latency memory




Anyway, I need recommendations on a BEAST of a Doom III machine.

Well, if you want to pay $1200 for an FX-57, go right ahead. I only paid $550 for an Athlon 64 4000+ and it works just fine for Doom 3. RoE lags in certain places, but in the original it kicks ass.

I paid $159 for my a64 3000+ and they both run fine even with an fx5200 (having 1Gb ram doesnt hurt either)