I guess I'm the exception here. My ideal SHTF weapons would be a silenced 10/22 and a high-cap 9mm. The .22 would allow for discrete hunting. No, it won't have the immediate knock-down, but it will get the job done on most animals (and people, too) if need be. The 9mm would be for last-ditch self defense. My thinking is that if I'm getting into a major firefight with folks, the fights mostly lost before it starts.
An alternate pistol would be a Blackhawk with both 9mm and .357 cylinders. That covers the two most common pistol calibers, and it's a lot easier to reload when you don't have to chase your brass.
There is a lot of good common sense here in this post. I agree with you for the most part. Good choices.