For those of you using a 4K monitor with the MacBook, how does it look when you run it at 2560x1440 resolution? I don't want to patch my MacBook to run 4K @ 60Hz so I'm thinking about buying a 4K monitor (future proof) and running it at 2560x1440. I'm specifically thinking about buying the 27" LG 27UD88-W USB-C monitor. Thanks in advance for your input.