I am also looking at the 680i board within the next few weeks, however I am going with the Evga board. I'd actually prefer to have the Asus striker board, but the price of that board is insane!
The Evga is $290
The Asus (striker) is $408 (Japan prices)
Hard call. An extra $100+ for the Asus board, or get the Evga board with a better cpu. I think the Evga board with a E6600 is looking pretty good. There are a lot of bugs on the Evga board, but it looks like the are on top of most of them with the bios releases.