If this is supposed to be a gaming machine, you're going a little heavy on the CPU and light on the GPU. Not a big deal but if you wanted to drop down to an i3, you could use the savings for a better GPU.
I would get an aftermarket CPU cooler so you can overclock better (conversely, if you aren't overclocking, drop down to a non K-series processor). I'd also consider throwing a SSD in there if there is room in your budget (Crucial M4 128gb perhaps?).
Other than that, looks pretty good.