I have a rig similar to that, Mass. Though I have NVidia and a bit more memory. You'll love it; I pull nearly a perfect score with the Windows Experience rating. I have my OS on a 256GB FLASH disk, and my User/Program directory on dual RAID0 1TB-WD black drives.
Erp, I have the FX-8350 COed to 4.4GHz though. Big-assed fan an this thing stays cool. It's a hot day, about 85 degrees F in this room, I'm playing Rift at 70 fps and the CPU is only up to 131 deg F. Heh, the fan is only running at 28RPM.