I'll be honest, I cried a little trying to build this thing. I am assuming you already have monitors and everything else?
PCPartPicker part list:
https://pcpartpicker.com/list/TJp8VY
Price breakdown by merchant: https://pcpartpicker.com/list/TJp8VY/by_merchant/
CPU: Intel - Core i9-7900X 3.3GHz 10-Core Processor ($969.99 @ Amazon)
CPU Cooler: NZXT - Kraken X62 Liquid CPU Cooler ($199.89 @ OutletPC)
Thermal Compound: Arctic Silver - 5 High-Density Polysynthetic Silver 3.5g Thermal Paste ($5.84 @ OutletPC)
Motherboard: Asus - STRIX X299-E GAMING ATX LGA2066 Motherboard ($328.99 @ SuperBiiz)
Memory: G.Skill - Trident Z RGB 64GB (4 x 16GB) DDR4-3200 Memory ($752.99 @ Newegg)
Storage: Samsung - 960 EVO 1TB M.2-2280 Solid State Drive ($429.99 @ Amazon)
Storage: Western Digital - Gold 4TB 3.5" 7200RPM Internal Hard Drive ($169.99 @ SuperBiiz)
Video Card: Asus - GeForce GTX 1080 Ti 11GB STRIX GAMING Video Card (2-Way SLI) ($784.98 @ Newegg)
Video Card: Asus - GeForce GTX 1080 Ti 11GB STRIX GAMING Video Card (2-Way SLI) ($784.98 @ Newegg)
Case: Corsair - Crystal 570X RGB ATX Mid Tower Case ($159.99 @ NCIX US)
Power Supply: EVGA - SuperNOVA G3 1000W 80+ Gold Certified Fully-Modular ATX Power Supply ($197.56 @ Newegg Marketplace)
Case Fan: NZXT - Aer RGB120 (3-pack) 61.4 CFM 120mm Fans ($68.39 @ OutletPC)
Case Fan: NZXT - Aer RGB120 (3-pack) 61.4 CFM 120mm Fans ($68.39 @ OutletPC)
Case Accessory: NZXT - Hue+ LED Controller ($46.99 @ NCIX US)
Total: $4968.96