You guys were super awesome and helped me out when buying my first mac ever about 5 months ago. But you forgot to tell me that the displays shrinks with time. When I first got it, it was HUUUGEE! Now it's more like, meh... So I need a secondary display. I have been reading a lot of threads in here and it seems that the Dell Ultrasharp displays are the way to go (if you don't want a mac screen). So... What's the difference between the U2713H and the U2713HM I have a non-retina mac (2013). Will the dell screen be a good bet or is there something else I should take a closer look at?