Just a quick note, you can use Ctrl +[ rather than Escape. Saves your fingers from constantly having to reach for that corner.
On my keyboard I need ALT GR for [. On a side note, I'm rather disappointed that the ESC key didn't get updated with modern keyboards. The keyboard vi was designed on had ESC where Capslock now resides.
I despise and hate with passion the Capslock key. On linux I always run setxkbmpap -option caps:escape. I wish the same could be done on Windows. I got used to it so much that I find myself from time to time writing catpital letters when I'm on Windows or foreign setup.
My hate for the key came years before I thought about the possibility of remapping it. Similarly, I hate the F1, a key that when accidentally pressed on some windows machines inside programs like excel can steal the focus and leave the computer unusable until it loads the useless help sidebar (when all I wanted was hitting the F2 for editing a cell content).
You can do that on windows, in some way. I've got it setup like that (former caps lock key acts like control), but I don't remember exactly what the setting was.