Well yes I could make it GPU-bound(getting a gpu with more VRAM but equal performance otherwise) but as I want to run the game @ 60fps I'm always held back by the CPU as all of my current FPS drops are caused by lacking CPU-power.
I'd go as far as saying one that doesn't exist as emulators tend to effectively use one core as far as I remember. Here's a 7850k struggling ( Specs in description):
For a emulation rig I'd definitely go with the G3258 if your going to play PS2 games etc. For example my old Phenom II 720be couldn't handle God of war properly.
Depends on what games you play. I don't really see a reason not to overclock as you've already got a K part. Just get a decent aircooler and overclock it.