If you want 3 years at 1440p you need to go for a 1080ti. May want a bigger PSU if you move up to a 1080ti. Everything else looks pretty good.
PCPartPicker part list:
https://pcpartpicker.com/list/rNpvfH
Price breakdown by merchant: https://pcpartpicker.com/list/rNpvfH/by_merchant/
CPU: Intel - Core i7-8700K 3.7GHz 6-Core Processor ($339.79 @ SuperBiiz)
CPU Cooler: CRYORIG - H5 Ultimate 76.0 CFM CPU Cooler ($46.89 @ OutletPC)
Thermal Compound: Noctua - NT-H1 3.5g Thermal Paste ($5.90 @ Amazon)
Motherboard: Gigabyte - Z370 AORUS Gaming 3 (rev. 1.0) ATX LGA1151 Motherboard ($148.99 @ SuperBiiz)
Memory: G.Skill - Ripjaws V Series 16GB (2 x 8GB) DDR4-3200 Memory ($169.99 @ Newegg)
Storage: Samsung - 860 Evo 250GB 2.5" Solid State Drive ($79.99 @ Amazon)
Storage: Seagate - Constellation ES.3 3TB 3.5" 7200RPM Internal Hard Drive ($86.00 @ Newegg Marketplace)
Video Card: Zotac - GeForce GTX 1080 Ti 11GB AMP Extreme Video Card ($877.99 @ SuperBiiz)
Case: NZXT - S340 (White) ATX Mid Tower Case ($59.99 @ Newegg)
Power Supply: SeaSonic - FOCUS Plus Gold 650W 80+ Gold Certified Fully-Modular ATX Power Supply ($79.98 @ Newegg)
Total: $1895.51
Prices include shipping, taxes, and discounts when available
Generated by PCPartPicker 2018-05-02 11:55 EDT-0400