Ouch! Buying a cooler the same price as your case?
How much cooling do you need? Looking for a max overclock? Are looks important to you?
Xigmatek HDT-SD964 is probably the best of the 92mm Fan coolers. Cools better than Zalman CNPS9700 NT. Saves $30
It's not too bad - but not nearly as good as the Xigmatek HDT-SD964
FrostyTech review Coolermaster Hyper N520 review Xig HDT-SD964: 18.8 11.6 57.2 (better cooling)
CM Hyper N520: 22.4 14.1 49.0 (quieter)