Looks pretty good but I would switch to a better power supply. I don't see anything wrong with a 850W for this build, I got an NZXT Hale 90 750W but I wish I had sprung for the 850. Oh well.
Dude does suggest a nice PSU, plus its less expensive.
Swap your asus mb with asrock z77 extreme 4 but you will not regret if you buy this mobo,I'm just suggesting it for the looks if it(very cool black lookibg mobo) and agree with htoontm,why are you not buying a ssd and replace your cpu cooler with cooler master hyper212 evo,it is very powerful as compared to its price.
5/10 if you are gaming at 1920x1200 or lower. 7/10 otherwise. I'm not sure why people are dumping so much money into expensive SLI setups when a single card config can run 99% of what is out there at max settings on a 1920x1200 or lower monitor. I would do a single card config and use that extra money to make some of your other "bargain" parts a little better.