Frankly you can put whatever you want in there. Just remember there will be zero overclocking since the space is to small to allow large enough heatsinks to make OCing doable.
[PCPartPicker part list](http://pcpartpicker.com/list/TLN9r7) / [Price breakdown by merchant](http://pcpartpicker.com/list/TLN9r7/by_merchant/)
Type|Item|Price
:----|:----|:----
**CPU** | [Intel Core i7-6700K 4.0GHz Quad-Core Processor](http://pcpartpicker.com/product/tdmxFT/intel-cpu-bx80662i76700k) | $328.01 @ Amazon
**CPU Cooler** | [CRYORIG C7 40.5 CFM CPU Cooler](http://pcpartpicker.com/product/Lbhj4D/cryorig-cpu-cooler-c7) | $50.96 @ Amazon
**Motherboard** | [Gigabyte GA-Z170N-WIFI Mini ITX LGA1151...