Ok, avoid that PSU (you have a 500W selected, not a 450W). The Corsair CX line is poor quality.
A SeaSonic S12II 520W would be perfect for this rig (with the 970) or an EVGA SuperNOVA B2 750W with the R9 390 I'm suggesting.
You added a wired network adapter...........you don't need those anymore. Almost all motherboards come with quality ethernet ports...
Any reason you're not looking at Skylake? (out of curiosity)
Any preference for GPU? Personally I'd go for an R9 390 with it's 8GB VRAM...
This would put you on the latest socket/platform & comes in right at your $1,000 budget
PCPartPicker part list /
Price breakdown by merchant
CPU: Intel Core i5-6600K 3.5GHz Quad-Core Processor ($238.89 @ OutletPC)
CPU Cooler: Cooler Master Hyper 212 EVO 82.9 CFM Sleeve Bearing CPU Cooler ($23.04 @ Newegg)
Motherboard: MSI Z170A SLI PLUS ATX LGA1151 Motherboard ($132.98 @ Newegg)
Memory: Team Delta 16GB (2 x 8GB) DDR4-2400 Memory ($57.99 @ Newegg)
Storage: Western Digital Caviar Blue 1TB 3.5" 7200RPM Internal Hard Drive ($49.48 @ Directron)
Video Card: Gigabyte Radeon R9 390X 8GB Video Card ($378.98 @ Newegg)
Case: Corsair 200R ATX Mid Tower Case ($44.99 @ Newegg)
Power Supply: EVGA 750W 80+ Bronze Certified Semi-Modular ATX Power Supply ($48.99 @ NCIX US)
Optical Drive: Asus DRW-24B1ST/BLK/B/AS DVD/CD Writer ($19.89 @ OutletPC)
Case Fan: Cooler Master SickleFlow 69.7 CFM 120mm Fan ($4.99 @ Newegg)
Total: $1000.22
Prices include shipping, taxes, and discounts when available
Generated by PCPartPicker 2016-03-21 17:59 EDT-0400
Skylake, keeping the 970, the SeaSonic PSU and add an SSD......still at $1,000
*There's no reason you couldn't keep the SuperNOVA B2 in this build, it wouldn't hurt.
Without the SSD, you're closer to $900...
PCPartPicker part list /
Price breakdown by merchant
CPU: Intel Core i5-6600K 3.5GHz Quad-Core Processor ($238.89 @ OutletPC)
CPU Cooler: Cooler Master Hyper 212 EVO 82.9 CFM Sleeve Bearing CPU Cooler ($23.04 @ Newegg)
Motherboard: MSI Z170A SLI PLUS ATX LGA1151 Motherboard ($132.98 @ Newegg)
Memory: Team Delta 16GB (2 x 8GB) DDR4-2400 Memory ($57.99 @ Newegg)
Storage: Samsung 250GB 2.5" Solid State Drive ($79.99 @ SuperBiiz)
Storage: Western Digital Caviar Blue 1TB 3.5" 7200RPM Internal Hard Drive ($49.48 @ Directron)
Video Card: EVGA GeForce GTX 970 4GB Superclocked ACX 2.0 Video Card ($314.99 @ NCIX US)
Case: Corsair 200R ATX Mid Tower Case ($44.99 @ Newegg)
Power Supply: SeaSonic S12II 520W 80+ Bronze Certified ATX Power Supply ($55.98 @ Newegg)
Optical Drive: Asus DRW-24B1ST/BLK/B/AS DVD/CD Writer ($19.89 @ OutletPC)
Case Fan: Cooler Master SickleFlow 69.7 CFM 120mm Fan ($4.99 @ Newegg)
Total: $1023.21
Prices include shipping, taxes, and discounts when available
Generated by PCPartPicker 2016-03-21 18:02 EDT-0400