I have almost completed this build. Just waiting for new fans to replace the stock ones. EmulationStation has been properly configured and is running quite nicely. I meant for this to be an even smaller build, but the AMD APU couldn't handle GameCube or PlayStation 2 games at a higher resolution with better textures. Buying the GTX 960 was a great middle-ground for performance/price, as well as being able to use it for folding once a month for the Foldathons.
Microsoft Windows 7 Professional x64 is installed on the internal SSD to run EmulationStation. And I installed Linux Mint 17.1 on a 16GB flash drive and I am getting about 170k PPD. I should be able to get some pictures up of the final build this weekend.
Overall, I am very pleased with this build, but I would have loved it if EVGA had used screws instead of rivets for the drive bays. The stock fans were definitely on the loud side so I purchased two BitFenix Spectre fans to replace them--hopefully that makes a difference.