When the Phanteks Evolv mITX case was launched I immediately wanted the case to upgrade from the Bitfenix Phenom mITX case, mainly cause it had a window and cable management was a dream.
Since I've started Cities Skylines I knew how heavily it relied on the CPU so that was upgraded to a Core i7 4770K from the previous i5 4690K mainly for the extra threads it has.
I've also changed the Power Supply from the Thermaltake Toughpower 650W to a EVGA Supernova G2 750W, although the power output was still the same, i mainly wanted it for the Cable Mod cables. Extensions would be cheaper but it would add un-necessary length to the cable to a compact case.
Normally I would overclock the CPU, but since the Australian summer is known to be quite brutal I'm currently running stock clocks