Well, I'm using Macbook pro 15inch 2013 full upgraded(Except for SDD) for college and works currently. I mostly use Photoshop, premier, and Lightroom only and sometimes play games. I have no problems for these days except for screen size, glossy panel(Window is right behind me), slow performance for RAM, and accessories like external HDDs. Anyway, not too soon but I might need better computer for photography works. Adding extra displays would be nice since Macbook pro 15inch is very small to me but I also need better performance. But I am not sure if I should stick with Mac OS computer or not. PC already perform way better than 5k iMac with same price(http://petapixel.com/2016/04/25/4k-pc-trounces-4k-imac-photography-speed-test/). Mac Pro is very expensive. One of my friend go Dell Alienware desktop for $3000 with great performance. Compare to Mac pro, I really hesitating that Mac pro doesn't even perform well base on its price. For now, I'm thinking to purchase extra display for Macbook pro but I def need desktop one day. Any advices?