switch out to AMD products of same price and you'll have higher performance, OR switch to equal performance and you'll save money.
This is an incredible Card stock, i can't imagine what it would be like boosted and OC...
I also recommend AMD CPU to pair with your AMD GPU for the AMD Optimized Tessellation, this will improve frame rate in games.
AsRock Z77-Extreme4 Intel Z77
You don't necessarily need to get an insane high end gaming Motherboard to use the performance of your CPU and or GPU, however, some of the features like Auto Clock can be nice, however many will strongly recommend against auto tuning your hardware. However, ASUS is an excellent choice, i used their M5A97 with hardly any performance differentiation between that and my ASUS Crosshair V Formula-Z.
Coolermaster SGC1000KWN1 SGC-1000 case
A case is a case, some breath better than others, if you really want to keep onto your $1000 budget, this is where you bite the bullet and get a cheaper case, like from Xigmatek or Rosewill.
Excellent company, however i fear the CX500 is not quite what i'd recommend, i have one, it runs a bit on the hotter side, i recommend my Corsair TX750 V2 lovely little guy, with Yellow instead of unsightly Green on it.
I hope your are buying an
ST310005N1A1AS-RK Seagate Barracuda 1TB HDD as this is the very best HDD i have EVER had.
Coolermaster Hyper-212 EVO CPU Cooler
A proper CPU cooler, very good choice.
G.Skill Ripjaws-X 8G Kit(4Gx2) DDR3
I once got a couple
4GB Value Ram DIMMs from Corsair, 2x4GB and fairly inexpensive too, allowing you to spend more where it counts.