I love my Springfield GI 1911. In .45ACP, of course. They make models with more bells and whistles but this one feeds FMJ and JHP with ease. Being a mortician, I have the opportunity to see the results of shootings. I keep SPEER Gold Dot HP ammo in mine. They perform very well. It's only 7+1, single stack, but if 8 rounds of .45ACP aren't enough, I shouldn't be carrying a firearm anyway. The narrow width of the weapon helps for carrying concealed, too.
Lawrence, I saw the same training film, I think. If I remember right, what finally incapacitated the guy was a .12ga bean bag to the kidney at point blank range. He also shook off pepper spray and a couple of taser hits. He survived the incident, too. That provoked a lot of Sheriffs depts to start using .357 revolvers.
That said, there have been vast improvements in performance of the 9mm cartridge in recent years, so I wouldn't fret about a 9 anymore. Anything .380 and up is great. For super concealment I carry a NAA .22mag revolver in a pocket holster that looks just loke a wallet to the average observer. Doesn't sound like much but a .22mag at point blank from a 1.5" barrel is pretty damn fierce, hot and loud! Id say out of the GSW bodies I see, most die from 9mm, shotgun or .22 at close range. Something to think about.