Well, I've switched to Sublime, I couldn't help it--it's a great fun to work with it.
Now, one question/idea:
I suppose this can't be done:
<binding key="`[0-9]*`x" command="myCommandAcceptingArgs thisKeyBinding">
# the key binding would be triggered by any valid key combination: x, 1x, 10x, 123x, etc.
# thisKeyBinding captures the actual sequence pressed by the user
This would allow, for example, to add counts to commands easily.
Maybe there's a better way of achieving the same thing?