I honestly have no clue if this build will even work together, I was hoping if someone can look this over and tell me if Im missing anything or i have extra parts that i don't need or even if Im paying too much for other parts that will have the same performance for less.
The new MOBO and GPU are simply awesome. You won't be needing more than that, so stay with those.
For the CPU I would choose the i5-3570, not the k-version though. It seems as if you won't be overclocking and the Gigabyte MOBO you added instead doesn't allow overclocking on the CPU, so no need getting any k CPU.
With this gaming system you can easily max out GW 2 and just about everything else, it's pretty balanced. Great job when you don't have a clue about you're doing.