Buying first handgun, stuck on caliber
I've been doing my research for about a month now and have not come much closer to making my decision. I've been touting some "weapons bans" and "price increase" rhetoric to her for months now, so, very recently, my wife gave me the final go-ahead on my first weapon purchase. My main reason for wanting a handgun is for home defense. (now, I know other weapons might be ideal, but the handgun is the ONLY thing that she'll allow, for now....it's my gateway, if you will)
For 10 years now, I've been very fond of Sig Sauer handguns. Yes, I've shot nearly every other type of handgun on many calibers. Several weeks ago I was stuck on the P220 .45 (maybe the Equinox). Since this gun will be something I'd like my wife to learn and train on, I've kinda moved away from the notion of such a big gun. Also, shooting practice rounds at the range will cost way less if I'm shooting a 9mm as opposed to the .45acp. I really, really LOVE shooting the ever-popular colt round, but am afraid the recoil will make a lady scared to shoot it. Anyone have advice or similar experiences with "girls shooting guns" expertise to share?
So really, I've been leaning towards Sig's P226 9mm. I like the gun as well, but not as much as the more powerful rounds. Now, I'm thinking about the plausibility of getting the P226 .40S&W and also buying a Bar-Sto 9mm barrel for cheap shooting (and wife-training). So with that, my question is this: Am I putting to much into a larger round for my defense purposes? Should I just stick with the 9mm and get used to it first...maybe later buying another, larger, handgun?
My other original concern for a 9mm, was it's ability to penetrate beyond target. My son sleeps 15 feet from my bedroom door - and right in it's line-of-sight. In the horrible scenario I'd be aiming in that direction, I'd be afraid of those possibilities. Please, tell me if I'm over-thinking this ;)
Any help or advice you guys could bestow on this young married guy, I'd appreciate it.