Purchase this:
Intel Boxed Core I5-6600K 3.50 GHz, 6 M Processor Cache 6 for LGA 1151 (BX80662I56600K)
its $230 on Amazon, and its a K processor so you can over clock it.
Buy yourself a reasonable Z170 Motherboard like: Gigabyte GA-Z170X-Gaming 3
$140 bucks from Amazon, its a nice board for the price.
An Nvidia GTX 1060 or RX480!
All the other components you can figure out for yourself but if you add up the above its like $500 to $600 price range, for a very sweet gaming computer!