The Kinesis Advantage 2 fits a Magic Trackpad perfectly right in the middle of the keyboard. This lets you perform mouse actions with you right and left hands.
Emacs keybindings never made sense to me till I tried them with the Kinesis. I feel like Emacs sucks on a standard Mac keyboard and is awesome with a Kinesis. See here for a blog post on the topic if you're interested in learning more: https://mungingdata.com/emacs/learning-emacs-keybindings-aft...
It takes a while to get used to the keyboard layout, but only takes a week to get fully productive. You're eventually able to train your brain to operate fluently on Kinesis & Macbook key layouts without any extra thinking. It's a great investment if you're willing to put in a bit of effort.