i have a pair of 9600 gts, and I am running the game on medium @ 1900x 1080. Not sure if my SLI is enabled cause I haven't got new drivers in the last 2 weeks, but the game is definately playable. I am waiting for my tax return then I plan on upgrading my pc.
Haven't done any frame rates yet, maybe I will tonight, but i don't notice any stuttering. Just make sure you set a high actor distance, sucks to get shot by arrows when you can't see who is shooting you.