I use this machine for Android Development.
The G1 Gaming video card I found to be quite impressive. I'm currently working on another X97 build, based also on the 4790K, with an Asus Maximus VII Formula motherboard. Once that is completed, I will probably relegate this build to a hackintosh for iOS development.
I have been quite pleased with this build. Originally, I planned to do Raid level 10 with 4 500gb EVO SSDs, but have decided to push that to the Asus build. I have also lagged on getting the other 16gb of ram, but I will come back to that.
I like the roominess of the Air 540 case, but I don't care for the case at all. Not what I would consider a quality product from Corsair. They need to do this form factor in their Obsidian Line, with a little more quality engineered into it. I purchased the NZXT 440 for my Asus build, and I will use it, but when it is all done, I will probably go for a case labs case.