That spec. is very similar to mine. Except I have a standard 8800GT and 4GB of RAM. Sounds great.
I've played the Crysis demo on very high settings (but only about x2 AA) and it ran extremely smooth up until the boat scene at the end. To many particles.
As for the motherboard, yes they do have several revisions, and unless you check the manufacturers website you won't always know if what you get is the latest. Must have been a nice surprise though. I've got a similar (Gigabyte) where the previous 2 revisions only went up to 1333 but mine suddenly jumped to 1600. But that's for overclocking, and I don't want to risk it yet.
