I ordered a 2015 MacBook Pro 13 and feel like I need a new monitor to go with it. I currently have a 2405FPW 1920x1200 and I would like more desktop space. Which do I get? a) 4k monitor running 2560x1440 HiDPI Retina or b) Dell U3415W 3440x1440 This is purely for work, no gaming. Clearly there's more desktop space on the U3415W, which I like, but will the text and clarity be as nice as the 4k running 1440p? Just wondering which will give me the best experience.