I work primarily on an iMac 5K 27". The screen on this thing blows me away. It's so good.
For mobility, I picked up a 13" 2016 MBP. I've decided it's better to work on an actual desktop at my desk and have a less powerful, mobility-focused macbook for when I need to be mobile. It's nice being able to pop in 32gb of RAM on the desktop. I'll probably get another 32gb soon.