I just bought the 2017 15" MacBook Pro about 2 weeks ago. Does anyone have any suggestions about a good external monitor for it? I think a 4K should be just about right for it. I looked at the LG on the Apple app, but I was wondering if there is some other good ones out there. I was thinking about portability too. So I'm looking at about 21"-24". I don't think I need anything bigger.