What's the budget and whats his display set up?
He is OK with the price if everything is from newegg but is open to a lower price point if it doesn't detract the performance of the machine. To start off he will probably be using one or two 1080p monitors but might move in to a 4K screen eventually.
A 6700k and a 1060?? If the budget is higher than a certain point get a 1070, if not then drop the cpu down to an i5 whatever k with a slightly better CPU cooler and go with a 480 over a 1060. Yes, yes, i know... the 480 isn't as good as the 1060 in benchmarks yadda yadda.
Why I recommend 480 over 1060:
1. Driver optimizations will improve the 480's performance to the point it beats the 1060
2. It has more vram which will help at higher resolutions
3. Vulcan and dx12 are the future api's and the 480 already has a lead there
4. No Nvidia bullshit like having to have a geforce experience account to run it or whatever
5. Freesync is a minimum of $100 cheaper than Gsync, usually it's much higher than that
The case is very expensive... VERY expensive for itx... you may want to reallocate some funds towards performance in the form of a 1070.
Corsair CX series PSUs are generally not that great... Seasonic is king when it comes to PSUs so check what they have to offer in the wattage and form factor you need.
A budget would be useful for us to have as well since we can help to explore ways to optimize the build for you.
We currently are at $1100 but if we could go + or - $100 for a better machine.
I found this PSU on newegg would it be a better option,
http://www.newegg.com/Product/Product.aspx?item=N82E16817151093
Also the owner is dead set on the case and is willing to pay the price for it.
O wow... Have you seen the usb3 plug on that board? Jesus, Gigabyte, this thing inside your skull is called BRAIN. Use it damn it...
There may be some serious problems with mounting the CPU cooler or plugging the USB front panel, depending on what you do first...
I'd go with a much smaller ITX case, the prodigy is almost micro ATX sized for an ITX case, but whatever, the Core 500 is another solid actual ITX sized ITX case, or maybe get a fractal design Nano
And probably just stick to the locked chip for performance per dollar, and less heat with it's lower TDP
and RX 470, because free-sync savings, and again performance per dollar, the 470 is highly capable for 1080p gaming, 60fps high-ultra in AAA games
PCPartPicker part list: http://pcpartpicker.com/list/wWPFZ8
Price breakdown by merchant: http://pcpartpicker.com/list/wWPFZ8/by_merchant/
CPU: Intel Core i7-6700 3.4GHz Quad-Core Processor ($294.99 @ SuperBiiz)
Motherboard: MSI B150I GAMING PRO AC Mini ITX LGA1151 Motherboard ($106.99 @ SuperBiiz)
Memory: G.Skill Ripjaws V Series 16GB (2 x 8GB) DDR4-2400 Memory ($62.99 @ Newegg)
Storage: A-Data Premier SP550 240GB 2.5" Solid State Drive ($62.99 @ Newegg)
Storage: Western Digital Red 2TB 3.5" 5400RPM Internal Hard Drive ($89.38 @ OutletPC)
Video Card: MSI Radeon RX 470 4GB Gaming X Video Card ($199.99 @ SuperBiiz)
Case: Cooler Master Elite 130 Mini ITX Tower Case ($42.99 @ SuperBiiz)
Power Supply: EVGA 650W 80+ Gold Certified Semi-Modular ATX Power Supply ($77.99 @ SuperBiiz)
Total: $938.31
Prices include shipping, taxes, and discounts when available
Generated by PCPartPicker 2016-09-23 21:45 EDT-0400