Question posed was:
Your IDEAL shot size for Home defense.
What is ideal for Joe the Plumber may not be appropriate fro Clem the Swat Team Commander or Gertie the retired Librarian. Anybody who says there is only one right answer is deluding themselves into thinking that there is only one right answer no matter who is doing the shooting, where the shooting takes place and who or what you are shooting at. Evaluate your situation, make your choice and live with it, I hope, but don't say that is the end all be all definitive answer for everybody. If you think that then you are wrong.
Good intentions will always be pleaded for any assumption of power. The Constitution was made to guard the people against the dangers of good intentions. There are men in all ages who mean to govern will, but they mean to govern. They promise to be good masters, but they mean to be masters.