Spent last week upgrading my PC and installed it Saturday. I was getting pretty fed up with the cable mess and wanted to come up with a way to get it all out of sight.
The case is a Thermaltake Level 10. My upgrade was pretty much all new: Asrock Z77, Intel i7 with liquid cooling, dual nVidia Quadro 600s, 8GB of 2133 DDR3, 120GB SSD. The only thing taken from the old machine was the 1TB hard drive and my PCIE 1x Serial port card. Old machine will be my 16 y.o.'s birthday present (along with a car, but she doesn't know that yet).
I mounted it to the wall with some extremely sturdy shelf brackets. Pretty happy with the way it turned out. That Thermaltake case is pretty kickass. Highly recommend it.