I've heard about that Mossberg for years. In fact I don't think there could be a gun thread on FR without mention of it! My local shop doesn't care for the Mossberg and is always trying to sell me the Remington 870 but I can't hear a word he's saying when I'm staring at a M4.
I like the looks I get at the range while shooting my .357. Everybody backs up, looks, and somebody always asks what I'm shooting.
For home defense I was also thinking of a pistol crossbow so as to not give away my location.
Gotta give yourself choices... indeed.
With a silencer and a red-dot sight the 5.7 would be a nice quiet way to move through the house and secure it.