Build looks good for the most part, but there are some alternatives I would definitely recommend instead:
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Thank you for the recommendations. After taking your feedback, others from this thread and some comments on PC Part Picker, I think I've narrowed my build down to two scenarios. Basically, I'm looking at a choice between a Skylake CPU/motherboard and a 980Ti. I'll list the two builds below, but do you have any thoughts on the advantages of each approach? Which one will be easier to upgrade going forward, and what should I expect performance-wise when considering a i5-6600K with a GeForce 970 vs. a i5-4690K with a 980Ti?
I also have to budget for a monitor in this build. I'm fine with a 1080 display for now, but might want to upgrade in a year or two.
Option 1: 469W
PCPartPicker part list: 
http://pcpartpicker.com/p/nqRyCJ
Price breakdown by merchant: 
http://pcpartpicker.com/p/nqRyCJ/by_merchant/
CPU: Intel Core i5-4690K 3.5GHz Quad-Core Processor  ($219.99 @ SuperBiiz) 
CPU Cooler: Cooler Master Hyper 212 EVO 82.9 CFM Sleeve Bearing CPU Cooler  ($24.89 @ OutletPC) 
Motherboard: ASRock Z97 Extreme3 ATX LGA1150 Motherboard  ($76.98 @ Newegg) 
Memory: Mushkin Blackline 16GB (2 x 8GB) DDR3-2400 Memory  ($73.99 @ Newegg) 
Storage: Crucial BX100 250GB 2.5" Solid State Drive  ($79.99 @ Amazon) 
Storage: Toshiba  3TB 3.5" 7200RPM Internal Hard Drive  ($87.89 @ OutletPC) 
Video Card: EVGA GeForce GTX 980 Ti 6GB ACX 2.0+ Video Card  ($639.99 @ SuperBiiz) 
Case: Phanteks Enthoo Pro ATX Full Tower Case  ($89.99 @ Amazon) 
Power Supply: EVGA 750W 80+ Bronze Certified Semi-Modular ATX Power Supply  ($54.99 @ Newegg) 
Optical Drive: LG UH12NS30 Blu-Ray Reader, DVD/CD Writer  ($39.95 @ OutletPC) 
Operating System: Microsoft Windows 10 Home OEM (64-bit)  ($93.75 @ OutletPC) 
Wireless Network Adapter: Asus PCE-N15 802.11b/g/n PCI-Express x1 Wi-Fi Adapter  ($17.87 @ Newegg) 
Monitor: Asus VS238H-P 23.0" Monitor  ($132.99 @ NCIX US) 
Total: $1633.26
Prices include shipping, taxes, and discounts when available
Generated by PCPartPicker 2015-10-11 22:30 EDT-0400
Option 2: 357W
PCPartPicker part list: 
http://pcpartpicker.com/p/bj24bv
Price breakdown by merchant: 
http://pcpartpicker.com/p/bj24bv/by_merchant/
CPU: Intel Core i5-6600K 3.5GHz Quad-Core Processor  ($257.42 @ Amazon) 
CPU Cooler: Cooler Master Hyper 212 EVO 82.9 CFM Sleeve Bearing CPU Cooler  ($24.89 @ OutletPC) 
Motherboard: Asus Z170-A ATX LGA1151 Motherboard  ($149.99 @ SuperBiiz) 
Memory: Crucial 16GB (2 x 8GB) DDR4-2133 Memory  ($88.99 @ Adorama) 
Storage: Crucial BX100 250GB 2.5" Solid State Drive  ($79.99 @ Amazon) 
Storage: Toshiba  3TB 3.5" 7200RPM Internal Hard Drive  ($87.89 @ OutletPC) 
Video Card: MSI GeForce GTX 970 4GB 100 Million Edition Video Card  ($304.49 @ SuperBiiz) 
Case: Phanteks Enthoo Pro ATX Full Tower Case  ($89.99 @ Amazon) 
Power Supply: EVGA 750W 80+ Bronze Certified Semi-Modular ATX Power Supply  ($54.99 @ Newegg) 
Optical Drive: LG UH12NS30 Blu-Ray Reader, DVD/CD Writer  ($39.95 @ OutletPC) 
Operating System: Microsoft Windows 10 Home OEM (64-bit)  ($93.75 @ OutletPC) 
Wireless Network Adapter: Asus PCE-N15 802.11b/g/n PCI-Express x1 Wi-Fi Adapter  ($17.87 @ Newegg) 
Monitor: Asus VS238H-P 23.0" Monitor  ($132.99 @ NCIX US) 
Total: $1423.20
Prices include shipping, taxes, and discounts when available
Generated by PCPartPicker 2015-10-11 22:31 EDT-0400
If prices fall by the end of November and I can find a cheaper version of Windows through an IT friend, that might push me toward option 2 with a 980TI card since it will be closer to my target budget.