Ultimate home defence pistol?

I inherited my father's old Winchester model 12 20ga pump. Never thought much about it, was in a dark corner of a local small pawn/ gunstore, and here was some buck for the 20ga. I bought it all. Then I came home and searched, and a 20ga at close range is pretty impressive. More power than a .44 mag.

Plus I learned how quick it is to break them down, just like in the movie "Bullitt" (that was an earlier exposed hammer, 1897?)