My favorite X-windows customization for improving the CLI experience (though it helps with all editing) is cranking up the key repeat rate to a lot higher than is possible in GUI control panels (and lowering the repeat delay):
xset r rate 160 80
I haven't found how to do this in OSX yet, but there is probably a way.
xset r rate 160 80
I haven't found how to do this in OSX yet, but there is probably a way.