A NZXT S340 and Zalman cnps9900max cooler... actually got it yesterday, but I then spent most of the day setting up the new X79 with e5-2630 hex core build inside it installing Windows 8.1 afresh and so on.
Took a lot of tweaking to get things running 'right' and to get gpu to work in pci-e 3.0 mode, though I still think something is a bit off since I get a 10,000 or so points lower realbench score on it than I did with my old P55 x3460 set up.
Anyway, it's a really nice case and I would definitely recommend it.