So I have an i5 4670k overclocked from 3.4ghz to 4.2ghz, 16gb of ddr3-1600mhz, and an xfx rx 570 at 1400mhz on the core clock, and 1900 on the memory. My question is, what would it make most sense for me to upgrade? Also, if I leave the upgrade for a couple of years, will the answer change, as games might become more intensive on the gpu than the cpu than they are now? I mainly game, and do pretty much no creative work.