As a fellow vim user, I don't get the esc key problem. <C-[> is the same thing and a lot less movement. Esc is too far away where as <C-[> is already where my hands naturally lie and similar to other patterns I use (<C-x><C-p>, <C-x><C-l>, etc). I seriously do not understand the whole obsession with the esc key. If you have to lift your wrists you're doing it wrong.