This build is for gaming, of course, but anything else? If not, you can probably do with 8 GBs of RAM. That should be more than sufficient if you're mostly gaming.
You won't need a 1200 Watt power supply for a 95 Watt TDP cpu and two 195 Watt TDP graphics cards (those are the major players). Overclock your CPU and your GPUs and you would still be very comfortable in a Corsair TX850 or similar power supply.
Nothing wrong with case or board. And 680's are sweet.
EDIT: I just saw that you do a lot of video editing. Ignore my RAM comment.
Nope, but I wanted the extra room, so later on I can put another 2x8gb sticks in there. So I would have 32gb.
Only reason is because I do extreme video editing
Sandy Bridge doesn't usually mix well with 2 x 8GB but if you're doing heavy duty video editing you might want to consider an X79 build - it will run a bit more but you'll be able to run up to 8 x 8GB without breaking a sweat.