If I had to choose between semi or revolver?
When we are talking HD at my house my first option would be my Mossberg 500 then my AR15. If I had a choice to use only a handgun in a HD situation I would probably go with my S&W Governor which I purchased for Anti-Car Jacking duty. I like the idea of having the .410 Shot shell with Winchester PDX1 or 000 Buckshot for close work.
"Better to fight for something than live for nothing."-General George S. Patton
"He said to them, "But now if you have a purse, take it, and also a bag; and "if you don't have a sword, sell your cloak and buyone.'' Luke 22:36