+1000 on training.
Not to be argumentative, but I have a different take.
My first concern is stopping an attack on me or my family. Shotguns and rifles are vastly superior to a pistol. The odds of a rifle round going through the walls of a house, going through the wall of another house and actually hitting someone are extremely small. Not impossible, but close.
OTOH, a bad guy doing damage after absorbing a few pistol rounds are not uncommon. Thus, if I can reach my AK, I would.
If I were to buy a shotgun today(I have had my Mossberg for about 20 years), I would probably pick up a Saiga 12 and convert it. It is an excellent weapon.
I also would not be too worried about noise. In a fight, most people experience an auditory exclusion effect along with tunnel vision. I would vote against the 357 and 44 based on capacity and recoil.