Shuttle XPC Cube SZ170R8 w/ i5-6600K @ techPowerUp
 

Shuttle's new SZ170R8 XPC Cube combines a potent CPU and a capable GPU - you won't need more for a nice gaming system or a VR setup. Not only is its mainboard rife with features, but the SZ170R8 also looks elegant and is incredibly small.

http://www.techpowerup.com/reviews/Shuttle/SZ170R8/