Ha, I have a 9500 1 gig memory; one of the first dual cores; and just 2 gigs memory, and I can run it with maxed setting and 2x AA. The graphics are not that "great", so it should not strain you machine in the least.
And yes, I got the game, love it, and have played it every spare moument since I got it. You know you got a great game when, "while" you are playing it, your thinking of all the other ways your going to play it the second and third time through. This game seems to have max replay value.
Talking to other party memebers, bah, I just give them gifts and orders 