PCPartPicker part list:
http://pcpartpicker.com/list/yFYQPs
Price breakdown by merchant:
http://pcpartpicker.com/list/yFYQPs/by_merchant/
CPU: Intel Core i7-6700K 4.0GHz Quad-Core Processor ($324.99 @ SuperBiiz)
CPU Cooler: CRYORIG M9i 48.4 CFM CPU Cooler ($19.99 @ Newegg)
Motherboard: ASRock Z170M Extreme4 Micro ATX LGA1151 Motherboard ($106.98 @ Newegg)
Memory: G.Skill Ripjaws V Series 16GB (2 x 8GB) DDR4-3000 Memory ($67.99 @ Newegg)
Storage: PNY CS2211 480GB 2.5" Solid State Drive ($139.99 @ Newegg)
Video Card: Gigabyte GeForce GTX 1070 8GB Windforce OC Video Card ($399.99 @ B&H)
Case: Cooler Master N200 MicroATX Mid Tower Case ($42.99 @ NCIX US)
Power Supply: SeaSonic 520W 80+ Bronze Certified Fully-Modular ATX Power Supply ($54.99 @ Newegg)
Operating System: Microsoft Windows 10 Home OEM 64-bit ($88.88 @ OutletPC)
Wireless Network Adapter: TP-Link TL-WN881ND PCI-Express x1 802.11b/g/n Wi-Fi Adapter ($17.08 @ OutletPC)
Monitor: Acer GN246HL 24.0" 144Hz Monitor ($189.99 @ B&H)
Keyboard: Cooler Master CM Storm Devastator Gaming Bundle Wired Gaming Keyboard w/Optical Mouse ($19.99 @ Newegg)
Speakers: Logitech Z313 25W 2.1ch Speakers ($31.99 @ Best Buy)
Total: $1505.84
Went with a mid sized system using a MATX case. The GTX1070 is just to big for ITX. It's possible to get a regular ATX MOBO/case for a similar price.
I'll admit, I was squeezing in some fairly low end peripherals at the end. And with actual shipping + tax the total cost will probably be more like $1550
If you wanted a fancier keyboard/mouse/speakers you could cut down to an i5-6600k. The M9i should be able to do around 4 - 4.2GHz OC on the i5.