So, my question is this: What size monitors are you using for development and how many?
27" 5K Apple Display (made by LG)... If I need a second monitor I open my macbook. I've never been a fan of multiple monitors, though. To me it's so much easier to have virtual desktops and just swipe to the one I need in fractions of a second without the need to refocus my eyes or look for my mouse pointer.