PC build with an i5-4690K and Geforce GTX 970?

That is difficult to answer with such little information. I do have a sample system that I recommend to normal PC hobby builders that is this:

PCPartPicker part list: http://pcpartpicker.com/p/v2wDK8
Price breakdown by merchant: http://pcpartpicker.com/p/v2wDK8/by_merchant/

CPU: Intel Core i5-4690K 3.5GHz Quad-Core Processor ($229.99 @ SuperBiiz)
CPU Cooler: Cooler Master Seidon 120V 86.2 CFM Liquid CPU Cooler ($34.99 @ Newegg)
Motherboard: MSI Z97 PC MATE ATX LGA1150 Motherboard ($87.99 @ SuperBiiz)
Memory: G.Skill Ripjaws X Series 8GB (2 x 4GB) DDR3-1866 Memory ($46.99 @ Newegg)
Storage: Western Digital Caviar Blue 1TB 3.5" 7200RPM Internal Hard Drive ($51.89 @ OutletPC)
Video Card: Gigabyte GeForce GTX 970 4GB WINDFORCE 3X Video Card ($329.99 @ Micro Center)
Case: Cooler Master N400 ATX Mid Tower Case ($44.99 @ Newegg)
Power Supply: SeaSonic 620W 80+ Bronze Certified Fully-Modular ATX Power Supply ($78.99 @ SuperBiiz)
Wireless Network Adapter: TP-Link TL-WN727N 802.11b/g/n USB 2.0 Wi-Fi Adapter ($12.99 @ SuperBiiz)
Total: $918.81
Prices include shipping, taxes, and discounts when available
Generated by PCPartPicker 2015-08-04 00:33 EDT-0400

It includes a decent wireless adapter, water cooling, and a GeForce GTX 970 video card. This is meant for people who will be overclocking the CPU, because that is the only reason to get a K series CPU. I did not include an operating system, keyboard, mouse, monitor, or speakers.
 
Here i just posted this for someone.

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: Asus GRYPHON Z87 Micro ATX LGA1150 Motherboard ($75.98 @ Newegg)
Memory: G.Skill Ripjaws X Series 8GB (2 x 4GB) DDR3-1866 Memory ($46.99 @ Newegg)
Storage: Samsung 850 EVO-Series 500GB 2.5" Solid State Drive ($177.89 @ OutletPC)
Video Card: EVGA GeForce GTX 970 4GB FTW ACX 2.0 Video Card ($343.98 @ Newegg)
Case: Cougar Spike MicroATX Mini Tower Case ($32.99 @ Mwave)
Power Supply: EVGA 750W 80+ Bronze Certified Semi-Modular ATX Power Supply ($59.99 @ NCIX US)
Total: $993.79
Prices include shipping, taxes, and discounts when available
Generated by PCPartPicker 2015-08-04 01:12 EDT-0400

Notes:
-SLI ready
-Overclockable
-Small form factor (mATX)
-500GB SSD for stutter free gaming and fast overall performance