Ryzen alternative:
PCPartPicker part list:
https://pcpartpicker.com/list/j3wBD2
Price breakdown by merchant: https://pcpartpicker.com/list/j3wBD2/by_merchant/
CPU: AMD - Ryzen 7 1700X 3.4GHz 8-Core Processor ($299.89 @ OutletPC)
CPU Cooler: Corsair - H100i v2 70.7 CFM Liquid CPU Cooler ($99.99 @ Newegg)
Motherboard: Asus - PRIME X370-PRO ATX AM4 Motherboard ($143.89 @ OutletPC)
Memory: Team - Vulcan 16GB (2 x 8GB) DDR4-3000 Memory ($164.99 @ Newegg)
Storage: SanDisk - SSD PLUS 240GB 2.5" Solid State Drive ($69.99 @ Amazon)
Storage: Western Digital - Caviar Blue 1TB 3.5" 7200RPM Internal Hard Drive ($46.49 @ OutletPC)
Video Card: EVGA - GeForce GTX 1080 Ti 11GB SC2 Video Card ($949.79 @ OutletPC)
Case: NZXT - S340 (Black) ATX Mid Tower Case ($54.99 @ Newegg)
Power Supply: Corsair - RMx 650W 80+ Gold Certified Fully-Modular ATX Power Supply ($74.98 @ Newegg)
Total: $1905.00
Prices include shipping, taxes, and discounts when available
Generated by PCPartPicker 2018-02-16 23:30 EST-0500
Ryzen has 8 cores vs the 6 of Intel but worse Single Core Performance.
Intel Build:
PCPartPicker part list:
https://pcpartpicker.com/list/YckNnH
Price breakdown by merchant: https://pcpartpicker.com/list/YckNnH/by_merchant/
CPU: Intel - Core i7-8700K 3.7GHz 6-Core Processor ($349.00 @ Amazon)
CPU Cooler: Corsair - H100i v2 70.7 CFM Liquid CPU Cooler ($99.99 @ Newegg)
Motherboard: Gigabyte - Z370P D3 ATX LGA1151 Motherboard ($114.89 @ OutletPC)
Memory: Team - Vulcan 16GB (2 x 8GB) DDR4-3000 Memory ($164.99 @ Newegg)
Storage: SanDisk - SSD PLUS 240GB 2.5" Solid State Drive ($69.99 @ Amazon)
Storage: Western Digital - Caviar Blue 1TB 3.5" 7200RPM Internal Hard Drive ($46.49 @ OutletPC)
Video Card: EVGA - GeForce GTX 1080 Ti 11GB SC2 Video Card ($949.79 @ OutletPC)
Case: NZXT - S340 (Black) ATX Mid Tower Case ($54.99 @ Newegg)
Power Supply: Corsair - RMx 650W 80+ Gold Certified Fully-Modular ATX Power Supply ($74.98 @ Newegg)
Total: $1925.11
Prices include shipping, taxes, and discounts when available
Generated by PCPartPicker 2018-02-16 23:32 EST-0500
Has 16 gigs of RAM at 3000Mhz, 8700k, and a 1080Ti.
PSU for both is good quality.
Like Dranzer said, releases are around the corner so consider that. That said, 1080Ti is still very powerful that will last at 1440p for quite a bit.