Just get an i5 6400 (or a 6500 if you don't want to OC right off the bat) and a Z170 motherboard, install an old BIOS that allows you to BCLK overclock, slap a watercooler on the CPU and push it to heaven. With Skylake, if you can find an old version of the BIOS, which is easy as hell, you don't need no damn K SKU.
If you want a non-K overclocking BIOS, get it from here:
http://overclocking.guide/intel-skylake-non-k-overclocking-bios-list/