So, I went with the 8600k because it beats or ties the i7-8700k in most of the gaming benchmarks and is within a few frames in all the rest, but more importantly, it's about a hundred bucks cheaper.
http://www.tomshardware.com/reviews/intel-coffee-lake-core-i5-8600k-cpu,5264-5.html
https://www.techspot.com/review/1505-intel-core-8th-gen-vs-amd-ryzen/
The Gammax cooler is not one of the top coolers out there, but it IS one of the top budget coolers as I mentioned before. It's also a MUCH better cooler than the average stock cooler and of course, these newer processors don't come with a cooler anymore anyhow. Plus, it has blue LEDs, so there you go.
The Gigabyte Z370 HD3 motherboard is not a high end board, but it's plenty good enough for the average gaming rig and much better than some high end boards from only one or two generations ago. It has 4+3 power phase, M.2 storage header, basically a lot of stuff standard that was only found on high end boards with Z97 and Z170.
16GB-DDR4 3000 G.Skill memory. You wanted 16GB, you got it. Plus, G.Skill is almost certainly the best, most reliable memory brand out there. The Trident-Z modules are a bit better than the Ripjaws, but I had to cut something back in the budget somewhere, so I went with these because they're still better than the majority of memory modules out there.
Here's the fun stuff.
I included a Samsung 960 EVO M.2 drive for the operating system and applications. It's only 250GB but that's plenty for the OS and a ton of applications. Here's the thing about M.2 if you are not familiar with the NVME storage speeds on Samsung drives. Generally most regular 2.5" SSDs give you somewhere between 500 and 550MBps sequential read and write speeds with anywhere from 10,000 to 90,000 IOPS random read and write speeds.
This 960 EVO gives you 3200MBps sequential read and 1500MBps sequential write speeds, and up to 330,000 IOPS random read and write speeds.
So this is VERY fast storage for the operating system and applications. At minimum, you're looking at three to five times faster than a standard SSD and in some cases possibly 7-10x faster. VERY fast. This is pretty much the second fastest consumer storage drive on the market and it's not far behind the fastest, which is the 960 Pro.
Also included a 2TB storage drive for games, movies, music, etc.
GTX 1060 6GB dual fan card, because, "I need a good graphics card". This is a good graphics card. At 1080p it outperforms last generations GTX 980 in most titles and at 1140p and 4k, it almost performs as well as the 980TI. For the price, this is an outstanding value considering guys were paying 6-800 dollars for this kind of performance two years ago.
The Enthoo Pro M tempered glass case is a wonder for the price. I haven't worked in THIS specific case, but I have built several systems in the Enthoo Pro and Enthoo Pro M original versions and I can tell you that this case has just about every feature you could ever want and is so much easier to build in than the majority of other cases in this price range that it makes you wonder why anybody even bothers with most of the others. Plus with it's full view tempered glass side panel you won't have to worry about scratches like cases with acrylic windows and it's beautiful to boot.
It also comes with 140mm Phanteks fans. One front intake and one rear exhaust. At some point you might want to add another intake and a top exhaust, but for now that should be just fine. If you ever decide to overclock or if you tend to push the system hard for extended periods, a couple of additional case fans will be a good thing to consider adding. If and when you do I'd suggest adding two more Phanteks fans just like the ones that come with it, or a couple of 140mm Noctua black Chromax fans, which are an even better choice and are probably several decibels quieter.
Had to drop out the Seasonic power supply to try and keep it near the budget you wanted, but this CX 650M is semi-modular and has very good reviews for a somewhat budget power supply. Obviously another twenty bucks would get you a much better quality Gold rated EVGA or Seasonic unit, but for the price this Corsair unit will be just fine and has a five year warranty.
PCPartPicker part list /
Price breakdown by merchant
CPU: Intel - Core i5-8600K 3.6GHz 6-Core Processor ($279.89 @ B&H)
CPU Cooler: Deepcool - GAMMAXX 400 74.3 CFM CPU Cooler ($20.89 @ OutletPC)
Motherboard: Gigabyte - Z370 HD3 (rev. 1.0) ATX LGA1151 Motherboard ($126.98 @ Newegg)
Memory: G.Skill - Ripjaws V Series 16GB (2 x 8GB) DDR4-3000 Memory ($148.55 @ Newegg Marketplace)
Storage: Samsung - 960 EVO 250GB M.2-2280 Solid State Drive ($117.49 @ OutletPC)
Storage: Hitachi - Ultrastar 7K3000 2TB 3.5" 7200RPM Internal Hard Drive ($56.50 @ Amazon)
Video Card: MSI - GeForce GTX 1060 6GB 6GB ARMOR OCV1 Video Card ($269.86 @ B&H)
Case: Phanteks - Enthoo Pro M Tempered Glass ATX Mid Tower Case ($109.98 @ Newegg)
Power Supply: Corsair - CXM 650W 80+ Bronze Certified Semi-Modular ATX Power Supply ($59.99 @ Amazon)
Optical Drive: LG - GH24NSC0B DVD/CD Writer ($15.49 @ OutletPC)
Total: $1205.62
Prices include shipping, taxes, and discounts when available
Generated by PCPartPicker 2017-10-21 22:24 EDT-0400
As I said before, your peripherals and accessories, or any RGB lighting you might want to add can be added at any time. If the budget is a bit stretched right now, don't worry, just add them when you are able to save a few more bucks. Believe me when I say you'll be a lot happier with a long lasting, great performing machine that you can add lighting to later than to skimp on something now just to make some lighting options fit and end up with a system that is not nearly as good as you could have had.
When you DO get ready to add lighting, I highly recommend the NZXT Hue+. This is what I use and it gives you endless options.