I do a lot of graphic illustration, but I also have been playing a lot of PC games as of late. Star Citizen and Elite Dangerous both kickstarted my rekindling love for space sims and was thinking if it were possible to make a minature VR/everything-machine while still maintaining a small form factor (and by small, I mean ITX). Most of my deskspace is occupied by my Intuos 4 and two 1366x768 Samsung monitors (I'm either planning on getting a third screen of the same resolution or buying one of those 16:10 ultrawide monitors, but the latter is too pricey atm).The 6600k is much cheaper and should perform pretty similarly for applications that don't use the extra threads and run a bit cooler at similar clock speeds.
But it really depends on your usecase.
Also I see most people talk about overclocking when mentioning these two CPUs, so I assumed that at stock speeds the i7-6700k would naturally perform better (I don't intend to overclock).
I've started to slowly assemble my rig piece-by-piece, but I wasn't sure if I should make any last minute changes to the CPU.
My PC Partspicker build.