Ok guys I'm gettin a new rig....... AMD 64 ATHLON 3800+ 939 with a Gigabyte K8N ULTRA SLI READY mobo. im gona get 2 SLI XFX XFX GeForce 6600 GT 128's so in the end i'll end up with a 256 SLI config. Will this SLI configuration beta out a x850xtpe? or a 6800ultra? or would i be better off to go with 1 6800ultra?