What market are you in? USA? Tuning is based on price/performance and that is affected by your specific market.
Overclocking has very limited benefits for gaming. The money saved might allow a much better GPU.
That's a decent cooler and will allow for good overclocking, if you get a good chip.
I would want a 'race-car' power supply for my high-performance gaming system, rather than the 'mini-van' PSU you have selected.
That's a decent motherboard, but I would use something different to save money or improve features.
Good choice with GPU.
If you are going to overclock, spend the extra and get fast (2400Mhz) memory.
Cases are a personal choice.
Have a look at these threads.
http://www.tomshardware.com/forum/id-2625445/build-log-consolidated-middle-school-builds.html
http://www.tomshardware.com/forum/id-2745440/g3258-4690k-memory-configuration-data-science-fair.html
http://www.tomshardware.com/forum/id-2719471/4690k-memory-overclocking-project-results.html
PCPartPicker part list /
Price breakdown by merchant
CPU: Intel Core i5-4690K 3.5GHz Quad-Core Processor ($229.99 @ SuperBiiz)
CPU Cooler: Cooler Master Hyper 212 EVO 82.9 CFM Sleeve Bearing CPU Cooler ($25.98 @ OutletPC)
Motherboard: ASRock Z97M OC Formula Micro ATX LGA1150 Motherboard ($99.98 @ Newegg)
Memory: G.Skill Trident X Series 16GB (2 x 8GB) DDR3-2400 Memory ($129.88 @ OutletPC)
Video Card: Asus GeForce GTX 970 4GB STRIX Video Card ($309.99 @ NCIX US)
Case: Corsair Graphite Series 230T Orange ATX Mid Tower Case ($76.99 @ Amazon)
Power Supply: EVGA 750W 80+ Bronze Certified Semi-Modular ATX Power Supply ($59.99 @ NCIX US)
Total: $932.80
Prices include shipping, taxes, and discounts when available
Generated by PCPartPicker 2015-08-02 11:56 EDT-0400
The PSU will allow later SLI for your GPU.
PCPartPicker part list /
Price breakdown by merchant
CPU: Intel Core i5-4460 3.2GHz Quad-Core Processor ($176.95 @ SuperBiiz)
Motherboard: ASRock H97M PRO4 Micro ATX LGA1150 Motherboard ($79.89 @ OutletPC)
Memory: G.Skill Ripjaws X Series 16GB (2 x 8GB) DDR3-1600 Memory ($81.99 @ Newegg)
Video Card: Asus GeForce GTX 980 4GB STRIX Video Card ($495.99 @ SuperBiiz)
Case: Corsair Graphite Series 230T Orange ATX Mid Tower Case ($76.99 @ Amazon)
Power Supply: SeaSonic S12II 520W 80+ Bronze Certified ATX Power Supply ($49.99 @ Newegg)
Total: $961.80
Prices include shipping, taxes, and discounts when available
Generated by PCPartPicker 2015-08-02 12:00 EDT-0400