I'm not sure why you would go with GTX 9xx series. GTX 1050 or 1050 Ti would be better.
You might get better performance if you bought a prebuilt. But only right now and due to inflated GPU prices.
Something like this - $749.99 CYBERPOWERPC Gamer Xtreme GXIVR8020A4 Desktop Gaming PC (Intel i5-7400 3.0GHz, AMD RX 580 4GB, 8GB DDR4 RAM, 1TB 7200RPM HDD, WiFi, Win 10 Home), Black - VR Ready
https://www.amazon.com/CYBERPOWERPC-GXIVR8020A4-Desktop-i5-7400-7200RPM/dp/B0747W15QL/ref=sr_1_3?s=pc&ie=UTF8&qid=1518968957&sr=1-3&keywords=cyberpowerpc&dpID=51n3tUIpoSL&preST=_SY300_QL70_&dpSrc=srch
vs
PCPartPicker part list:
https://pcpartpicker.com/list/bd6Cmq
Price breakdown by merchant: https://pcpartpicker.com/list/bd6Cmq/by_merchant/
CPU: Intel - Core i3-8100 3.6GHz Quad-Core Processor ($109.99 @ Amazon)
Motherboard: MSI - Z370-A PRO ATX LGA1151 Motherboard ($115.99 @ Newegg Marketplace)
Memory: Team - Vulcan 8GB (2 x 4GB) DDR4-3000 Memory ($92.99 @ Newegg)
Storage: Western Digital - Caviar Blue 1TB 3.5" 7200RPM Internal Hard Drive ($46.49 @ OutletPC)
Video Card: Gigabyte - GeForce GTX 1050 Ti 4GB Video Card ($214.98 @ Newegg)
Case: NZXT - S340 (Black) ATX Mid Tower Case ($66.99 @ SuperBiiz)
Power Supply: Corsair - CX (2017) 450W 80+ Bronze Certified ATX Power Supply ($44.89 @ OutletPC)
Operating System: Microsoft - Windows 10 Home OEM 64-bit ($92.99 @ Adorama)
Total: $785.31
Prices include shipping, taxes, and discounts when available
Generated by PCPartPicker 2018-02-18 10:55 EST-0500
or AMD
PCPartPicker part list:
https://pcpartpicker.com/list/Tf8fr6
Price breakdown by merchant: https://pcpartpicker.com/list/Tf8fr6/by_merchant/
CPU: AMD - Ryzen 3 1200 3.1GHz Quad-Core Processor ($97.99 @ Amazon)
Motherboard: MSI - B350 TOMAHAWK ATX AM4 Motherboard ($79.99 @ Amazon)
Memory: Team - Vulcan 8GB (2 x 4GB) DDR4-3000 Memory ($92.99 @ Newegg)
Storage: Western Digital - Caviar Blue 1TB 3.5" 7200RPM Internal Hard Drive ($46.49 @ OutletPC)
Video Card: Gigabyte - GeForce GTX 1050 Ti 4GB Video Card ($214.98 @ Newegg)
Case: NZXT - S340 (Black) ATX Mid Tower Case ($66.99 @ SuperBiiz)
Power Supply: Corsair - CX (2017) 450W 80+ Bronze Certified ATX Power Supply ($44.89 @ OutletPC)
Operating System: Microsoft - Windows 10 Home OEM 64-bit ($92.99 @ Adorama)
Total: $737.31
Prices include shipping, taxes, and discounts when available
Generated by PCPartPicker 2018-02-18 10:57 EST-0500
The AMD RX 580 4GB will greatly outperform a GTX 960, 950, or 1050 Ti.