I've been thinking of purchasing additional firearms so that I have 2 of each category: 2 hunting rifles 2 semi-autos 2 shotguns 2 full size pistols etc. Preferably, I'd like to get the same make and model of each so that in a TSHTF scenario, I can scavenge parts from one to another if necessary and prolong the overall life of my arsenal. I'd also be able to buy one batch of ammo for each gun. Ok, that said, the big question now is on the last entry: full size pistols. Last year I bought a Taurus 24/7 in 9mm. I love the thing. Fits my hand great, wife and even kids can shoot it with no problem. That answers part of the question. Second gun will most likely be a 24/7. I am questioning the cartridge however. Question is, should I trade it for 2 .40SW or 2 .45ACP - again sticking with Taurus. Is going for more stopping power worth 1. losing 2 - 5 rounds in the magazine? 2. ending up having to spend more on ammo? 3. Having a gun that the wife and kids would find more difficult to handle. Opinions welcome.