A brisbane X2 will run the game just fine, 30FPS is playable is it not???? Overclock that 4400+ past 2.5GHz, possibly towards 3.0GHz and the game will be great with an 8800 series card. I'm on a bloody 3800+ Manchester and I get 30 FPS on high with the ultra-high faux Vista CVARs
I have it OC'd to 2.7 GHz and the average is below 30 FPS. Now that is using the default High config and at 1280x720 rez. Avg is about 25+ on the bench and the third level is below30 always, I think I need a new socket platform.