I'd be interested, I'm always up for a newer box.
I'd add a third 2 T HD and raid. Also a card reader, but that's not a deal breaker.
The GTX 680 specs on the NVida site suggest that it supports 4 monitors, is that 4 independent monitors, or are some mirrored? I currently have a GTX 550Ti, and although I thought it did it does not.
Chris