Since this is the first time you are building a computer I d have a couple of questions for you.
1. Why are you getting a $450 motherboard?
2. Why are you getting 32 gb of ram?
The i7-3770K is an ok purchase because it is a top quality cpu and the two GTX 670's are also a good choice.
SeaSonic X Series X-850 (SS-850KM Active PFC F3) 850W ATX12V v2.3 / EPS 12V v2.91 SLI Ready CrossFire Ready 80 PLUS GOLD Certified Full Modular Active PFC Power Supply
Corsair Special Edition White Graphite Series 600T Steel / Plastic ATX Mid Tower Computer Case
$179.99 and a $20 rebate makes the final price $159.99.http://www.newegg.com/Product/Product.aspx?Item=N82E16811139005
These are also top quality choices to go along wth what you are already choosing for parts.