Here is a build assuming that you will use your existing GTX 970, your PSU and HDD. I chose the i7 6700K to keep it Skylake but I would actually go with a Haswell-E processor if it was up to me (5820K). This would give you 6 cores and better multi-core performance. Let me know if you would like to see a Haswell-E build or something at a lower price point.
PCPartPicker part list:
http://pcpartpicker.com/p/rn48nQ
Price breakdown by merchant: http://pcpartpicker.com/p/rn48nQ/by_merchant/
CPU: Intel Core i7-6700K 4.0GHz Quad-Core Processor ($398.50 @ Newegg)
CPU Cooler: Cooler Master Hyper 212 EVO 82.9 CFM Sleeve Bearing CPU Cooler ($24.88 @ OutletPC)
Motherboard: Asus Z170-A ATX LGA1151 Motherboard ($153.99 @ SuperBiiz)
Memory: G.Skill Ripjaws 4 series 16GB (2 x 8GB) DDR4-2400 Memory ($74.99 @ Newegg)
Storage: Samsung 850 EVO-Series 250GB 2.5" Solid State Drive ($84.34 @ Amazon)
Storage: Seagate 1TB 3.5" 7200RPM Hybrid Internal Hard Drive ($0.00)
Video Card: MSI GeForce GTX 970 4GB Twin Frozr V Video Card ($0.00)
Case: Corsair 200R ATX Mid Tower Case ($49.99 @ Micro Center)
Power Supply: Silverstone Strider Plus 700W 80+ Bronze Certified Fully-Modular ATX Power Supply ($89.99 @ Amazon)
Optical Drive: Lite-On iHAS124-04 DVD/CD Writer ($16.88 @ OutletPC)
Operating System: Microsoft Windows 10 Home OEM (64-bit) ($87.95 @ OutletPC)
Total: $981.51
Prices include shipping, taxes, and discounts when available
Generated by PCPartPicker 2016-01-25 21:42 EST-0500