I'll go out on a limb further, and say that for the average home owner, for home defense only, a semi-auto in 20 gauge, with no. 4 buck, a 20 inch barrel, and a cylinder choke, is the best all around shotgun. Light, handy, lightening quick, and devastating at house distances (up to 25 feet), there is absolutely no need for a 12 in this scenario.
Mannyrock