lol, I have a S754 3000+ CPU, that's not "fast" at all :)

a few screenshots "in-action"

tomorrow i'll be fearin' on the dual 7800 gtx bandwagon :)
nice prospective

well, I have to say even on maximal settings +4*fsaa and 8 *af at 1024*768 the games doesn't look all that great when not fighting, in fights and slomo it all changes for the positive, and so does the framerate, negatively...
even on fx@2.6 ghz and dual 7800 gtx sli @ 500/1300 it's still not 100% fluid...

they use many optical tricks to make the game look better when moving fast, but up close things get "ugly".

I hope you have DISABLED soft shadows, as it does not add anything to the game and slows things down a lot. A single 7800GTX averages at 56fps at 1024x768, but I'm not sure if there is a suitable SLI profile available for this game?

try to lower FSAA to 2* and play a bit with the medium/high settings, as some affect performance more and don't change the visual aspects of the game (or barely noticable)

I'm playing it fluently on 6800GT & 3000+ S754, and it doesn't look bad (look at the screenies in my post above)