Note that you can upgrade the RAM on the 13" model to 16GB, although you have to do this at purchase time, it's not possible to expand later with the current mo

Note that you can upgrade the RAM on the 13" model to 16GB, although you have to do this at purchase time, it's not possible to expand later with the current model. I, personally, use a 13" with 16GB RAM and have external screens both at home and at work. It provides a good balance between portability and utility.