That Noctua D-12 is a freakin huge cooler and works like a charm....but man is it ugly!!! Excellent cooler for a very nice test setup though.
That Sapphire looks sooo sexy too..only makes me want mine sooner!
I considered the N-12 for my next build but opted for the louder yet more aesthetically pleasing (not to mention better clearance for RAM heat spreaders) CPNS9900 Max Red LED. Going for 2 HD 7970's (Sapphire just like the one you're got) on a Asus ROG board with the HAF 932 Advanced case. Should look awesome.