Tough situation to find yourself in for sure.
Can't say what I'd do. My history has been to not use weapons beyond my fists and things have worked out, but I'm not saying that it's the best choice for all. I know I go into "auto" mode and no thinking is required, but I cannot tell you in advance how I would react.
I think you did incredibly well, and probably ended up down the road of least future hassels, but the price wasn't cheap. I'm glad you and yours are OK, and would like to read any followup.

Really too bad you didn't have KK with you. He could have called them some cool names.