I use a 13" macbook air (fully optioned) for xcode - objc and swift, easily get a day out of it, I'm regularly surprised with "you have only 5% charge left", oh

I use a 13" macbook air (fully optioned) for xcode - objc and swift, easily get a day out of it, I'm regularly surprised with "you have only 5% charge left", oh time to charge it. Performance is great, better than my behemoth windows box with C#. I even run a couple of windows VM's on it for other dev work and runs like a charm. The best thing is its so light! I remember thinking I should get a macbook pro, but glad I went with the air. The only reason I'd consider a pro is if I wanted to do a lot of video work, but then my daughter has my old air and she makes movies with it, though space is sometimes an issue. If it came to that one of those Samsung USB3 external SSD's are dirt cheap now. I know people who run VM's on them over USB 3. If you want more than one external monitor though it can get expensive - you need to daisy chain thunderbolt's. USB monitors are possible, but not sure about performance on those. I have an external 27" monitor on mine and works fine, I have recollections of running a third monitor over airplay to my apple tv, but I'd have to check that it's been a while (I use my phone for that now)