I built this machine to have has a backup minor gaming machine for friends to use when they're over. I'm very happy with the parts I've chosen. The CPU is BETTER than the core i5 750 I had before, but on gaming benchmarks I'm getting scores near identical to i5. I can run any triple AAA title @ 1080p High/Ultra graphics 40fps+.
[Update 12/2014] Had this machine for over 10+ months now. It has served me well & is a very stable build & have had no issues. If i'd change anything it would be the GPU for a 750 Ti, because it would make the perfect troubleshooting card (not requiring any addition PCIe power) & I don't like AMD cards... I don't like messing around with their drivers and generally I have more faith in NVIDEA.