So I'm buying a used 2080ti for a good price. Which means I can go all out for a 9900k. My issue is that I don't plan on over clocking and actually wanna under volt everything to keep the parts cool in a small DIYPC case that I'll fix up to make everything fit. With over clocking out of the way. What processor should I be looking at if I only want to play 4k60 games and get into VR.