I would personally go with an i5 2500k. It's $120 less than the 3770, with a minimal performance hit gaming. For the GPU I would also personally grab a factory OC GTX 670, but that's solely personal preference. The GTX 670 is something like $30-$50 more & should only see a minimal boost in average performance at 1920x1080. And I get squeemish OC'ing GPU's.

http://www.anandtech.com/bench/Product/550?vs=598

I would also say drop the RAM down to 4GB. There's no reason to go beyond that gaming unless you're using a RAM disk, which is better replaced by a 60GB-120GB SSD for roughly the same price.