While at my desk I want to hook up my laptop to 2 displays (1080p, not 4k), back up hd, wired keyboard, and printer. Will a 2015 13" MacBook Air be able to do this without any lag on the displays? I'll just be using the laptop to write reports and check emails...nothing strenuous. I went into the Apple Store and an Apple Salesman (not a Genuis) told me it probably wouldn't work. He recommended a rMPB. He said it would take a powerful cpu to push 2 displays. Was he right or just trying to get me to buy the more expensive item? The majority of the time I'll be using the laptop at my desk. A couple of times a month I'll be out and about all day long long and want long battery life. I don't think I'll need a retina screen (my home laptop is a non retina mbp and looks fine to me) and I want a 512gb hd. The rMBP with one is $1800 and I don't want to spend that much.