I have the same board and have had some issues with it at first but now it's a solid, stable board. I would wait for the 780/790i revisions to come out which should be out within the next week. The 780i is the same as the 680i but with support for PCI-E 2 and an extra 16x PCI-E controller for 3 16x slots. If you need something now from what I've read the Evga 680i revision A1 is good but somewhat hard to find there are several different models but the model number you want is Evga 680i 122-CK-NF68-A1.
here's one http://www.zipzoomfly.com/jsp/ProductDetail.jsp?ProductCode=246711
I'm sure with the 780i they will have solved the issues that plagued the 680i so you might want to wait.