Basically, the general message seems to be that if you want to play DOOM III with all of the eye candy on (and you do!) then you need an NVIDIA GeForce 6800 Ultra or GeForce 6800 GT to get the best experience, and that these cards kick sand in the face of any competition (i.e. ATI, etc.)
Do benchmarks ever lie? Has anyone managed to play this game yet on anything? I know its not out yet, but has anyone heard any "reports"? Of course, ATI claims a new driver will sort all of this out.