Look at the top end of https://www.reddit.com/r/PCMasterRace/wiki/builds . That will do.
As to 4K, you blow past a few thousand today to get to 30 frames per second. Maybe there will be a breakthrough soon.
Building a new PC this July or so. It will run an Intel Core i5-6600K 6M Skylake Quad-Core 3.5 GHz, 32GB DDR4, and a few other bells and whistles but those are the big two. I am unsure which video card to go with. I'm willing to spend up to $500 on one but I know from past builds that throwing money at a video card isn't always going to get you the best one. I will mainly be gaming and emulating but may dabble into some video work too but nothing too major.
4K would be nice but isn't a deal breaker. 1440p though, that just may be. Might get a new monitor. Another possible concern is that I'm not sure what's on the horizon. Is building this in July a sound move or is better close to release?
I thank everyone who reads or responds for their time!