1. If this is a gaming box and component selection was limited by budget concerns, a 7600k will do just fine; unless you have workstation apps or doing video editing, the 7700k doesn't bring anything toi the table except a higher core speed outta the box.
2. Either way you will need a CPU cooler. I would suggest a air cooler unless you want to do a custom loop or Swiftech / EK AIO. CLCs are a complete waste of time, money and effort.
3. Subject to variables in the market from country to country, the price "break point" for RAM is usually between 3000 and 3200 at which point prices rise sharply.
For the same price, you could get 2400 RAM
https://au.pcpartpicker.com/product/hx648d/corsair-memory-cmk16gx4m2a2400c14r
https://au.pcpartpicker.com/product/nq38TW/kingston-memory-hx424c15fbk216
For $16, you could get 3200
https://au.pcpartpicker.com/product/p6RFf7/corsair-memory-cmk16gx4m2b3200c16
4. MoBo selection is based upon matching the features you need with the price you can afford. PCPP noted no incompatibilities with your build only because you did not select a MoBo. For the sake of completing the build, I will start at the "baseline" and for that I agree with anadtech that MSI has 'redefined the baseline w/ their SKI PLus series.
http://www.anandtech.com/show/10236/the-msi-z170a-sli-plus-review
The current 270 version is the MSI Z270 SLI PLUS
5. If you go ahead and buy a 120 GB SSD, you will surely regret it. Within 6 months, you will be trying to clean out your boot drive because it will be filled with junk and, if you are not an astute windows user, you will struggle w/ figuring out what to remove, if you are an astute user, you will be frustrated with the chore of doing this over and over again. We refuse to include a 120 GB SSD in any user build because they keep bringing them back when they run outta room. If need by, drop the 7700k for 7600k and get a 250 GB (M.2 version)
6. The 2 TB HD you have chosen is one of the fastest ones on the market. However, remember that the SSD does squat for your gaming library that is stored on the HD. An SSHD however has a small SSD built in to the HD which increases speed in games by 50% ... the proverbial "no brainer".
7. I would not choose a CXM series PSU .... while the CX750M is a much better PSU than it's predecessor, it still is considered, "a good PSU for the ,money" but the emphasis is on the last 3 words. You need a 500 watt PSU if not overclocking, 750 for SLI which I can't currently recommend outside of 2160p Add 50 / 100 watts if overclocking. So the 750 is oversized for a single card and undersized for SLI. But if ya want a 750 watter, I'd go with the much higher quality B2 (9.5 Build Quality) from EVGA for $3 more than the CXM (8.5 Build Quality)
B2
http://www.jonnyguru.com/modules.php?name=NDReviews&op=Story6&reid=393
CXM
http://www.jonnyguru.com/modules.php?name=NDReviews&op=Story6&reid=486
8. I'm going to upgrade the case to the tempered glass version simply because you have the budget
This gives you a much improved build w/ all your accessories for total build price of $2,171 leaving you two options $130 below your budget
a) Grab that 7700k from original build... it won't help to any significant extent in gaming but you have the room in budget.
or
c) Wait till the AIB 1080 Tis drop and are sufficiently stocked, that should move the price of the 1080s down vlose to $700 and grab the 1080 instead.
Tho, at your chosen resolution the 1070 is more than enough
PCPartPicker part list /
Price breakdown by merchant
CPU: Intel Core i5-7600K 3.8GHz Quad-Core Processor ($314.00 @ Shopping Express)
CPU Cooler: Phanteks PH-TC14PE 78.1 CFM CPU Cooler ($99.00 @ PCCaseGear)
Motherboard: MSI Z270 SLI PLUS ATX LGA1151 Motherboard ($227.00 @ IJK)
Memory: Corsair Vengeance LPX 16GB (2 x 8GB) DDR4-3200 Memory ($175.00 @ Shopping Express)
Storage: Kingston HyperX Fury 120GB 2.5" Solid State Drive ($75.00 @ Centre Com)
Storage: Samsung 850 EVO 120GB M.2-2280 Solid State Drive ($126.88 @ RamCity)
Storage: Seagate FireCuda 2TB 3.5" 7200RPM Hybrid Internal Hard Drive ($152.00 @ Shopping Express)
Video Card: Gigabyte GeForce GTX 1070 8GB G1 Gaming Video Card ($585.00 @ Shopping Express)
Case: Phanteks Enthoo Pro M Tempered Glass ATX Mid Tower Case ($149.00 @ PCCaseGear)
Power Supply: EVGA 750W 80+ Bronze Certified Semi-Modular ATX Power Supply ($129.00 @ PCCaseGear)
Operating System: Microsoft Windows 10 Home OEM 64-bit
Monitor: BenQ XL2411Z 24.0" 1920x1080 144Hz Monitor
Keyboard: Logitech G213 PRODIGY Wired Gaming Keyboard ($74.00 @ Shopping Express)
Headphones: Logitech G231 PRODIGY Headset ($65.00 @ Shopping Express)
Total: $2170.88
Prices include shipping, taxes, and discounts when available
Generated by PCPartPicker 2017-04-14 02:32 AEST+1000