I had the upgrade itch on my 4790k after I picked up a secondhand 1080ti and a Alien Ware ultra wide curved 3440x1440 (coming from 1920x1200). I then looked at all the current price trends (and how mental they have gotten since I bought the Z97 platform and decided I couldnt afford it unless I could ride the secondhand wave of everyone moving to the new z390 & CPU's and picking up some bargains. Built it back in late 2014 and has lasted well. Although been through several GPU upgrades since then, 980, 980 SLI, 980ti, 1080ti.
So to cure my itcht I decided to look into delidding my 4790k to get some more OC out of it (4.4 atm) , replacing my current H80i with a H150i, adding a proper fan controller and upgrading all the fans in the chasis for my 750D and then have me some fun squeezing some more performance out of it.
I also started looking into swapping out my RAM (
https://www.overclockers.co.uk/team...00c11-2666mhz-dual-channel-kit-my-055-tg.html) with some higher speed modules but seems quality high speed DDR3 even in the second hand market or retail is like rocking horse poop at the moment.