PCPartPicker part list:
http://pcpartpicker.com/p/GFPCpg
Price breakdown by merchant:
http://pcpartpicker.com/p/GFPCpg/by_merchant/
CPU: Intel Core i7-6700K 4.0GHz Quad-Core Processor ($339.99 @ Newegg)
CPU Cooler1: Noctua NH-D14 65.0 CFM CPU Cooler ($72.69 @ Newegg)
CPU Cooler2: Cooler Master Hyper 212 EVO 82.9 CFM Sleeve Bearing CPU Cooler ($29.99 @ Newegg)
Motherboard: Asus Z170 PRO GAMING ATX LGA1151 Motherboard ($147.98 @ Newegg)
Memory: Corsair Vengeance LPX 32GB (2 x 16GB) DDR4-2400 Memory ($119.99 @ Newegg)
Storage: Samsung 850 EVO-Series 250GB 2.5" Solid State Drive ($84.49 @ Newegg)
Storage: Seagate Barracuda 2TB 3.5" 7200RPM Internal Hard Drive ($71.99 @ Newegg)
Case: NZXT S340 (White) ATX Mid Tower Case ($59.99 @ Newegg)
Power Supply: SeaSonic S12II 620W 80+ Bronze Certified ATX Power Supply ($71.98 @ Newegg)
Monitor: BenQ GW2765HT 60Hz 27.0" Monitor ($352.98 @ Newegg)
Other: GTX 1080 ($600.00)
Total: $1944.07
Prices include shipping, taxes, and discounts when available
Choose either CPU cooler depending on whether you intend to overclock.
Monitor is 1440p IPS (good colors and viewing angles): The overall gaming performance of the BenQ GW2765HT was reasonably good for an IPS-panel. The AMA 'High' setting seemed to offer the optimum balance between response times and overshoot. - TFTCentral
It's also the second cheapest 1440p monitor easily available, and 4K gaming is just not ready yet if you wanna max settings.
Leaves you a few dollars for mouse and keyboard. I'm a big fan of Logitech and, certain, Corsair products.
Above mentioned build lacks a CPU cooler (doesn't come with this processor) and fills all memory slots in the most ineffecient way possible. For 33% more $ you get 50% more RAM with the possibility to upgrade for more in the future.