I know this probably gets brought up a lot, but I'm a tad confused. I have the latest mac mini and i'm interested in purchasing a 4k monitor. I understand the limitations in that I can't run it at full resolution at 60hz, but can I run the monitor at 2560 x 1440 60hz? I'm trying to replace an older Apple Cinema Display and want to keep the resolution the same. And is my assumption correct that at 2560 x 1440, it'll just be more crisp like a retina display? Thanks!