In reply to Justjim75 :
It sounds like you've never tried to fire a pistol in a high stress situation. Half asleep with adrenaline coursing through your veins is a Hell of a lot different than hanging out at the range. Unless you have a live band playing at the range while you practice, potentially shooting back at you.
Pistols are great to carry for defense, but frankly I think they're downright dangerous for home defense. No spread, plenty of energy to go right through walls or ceilings when you miss, semiautomatic are prone to jamming at just the wrong time.
I suggested the Serbu if you're really hung up on it being a pistol. A 45/410 would be also a good choice if you want to keep to a small form factor, and as a revolver, it won't jam on you when you need it most.
I won't use my AK for home defense, despite some people believing it's all about how much lead you can get into a door shaped hole in the quickest period of time. It's not home wielding friendly. Sure, you can empty the 75 round drum in seconds, but accuracy is a bust, it's large, and will do a Hell of a lot of collateral damage with every shot that misses. The only thing it has going for it is every time I empty the drum at home, cops show up quicker than they would to a burglary call.
I keep a 45 (redacted) for home defense, and it's only there to let me get to my gun cabinet where the shotguns live. When I get a Serbu or 45/410, the Ruger will return to the cabinet. Of course I also have a gravel driveway and a paranoid dog, so I can get to the gun safe before anybody busts the window on the front door and opens the dead bolt. The one nice thing about my house starting life as a 1950s hunting cabin is that the entire first floor is cinder block without many windows, so I don't have to worry about a miss getting through to the neighbors house.
My other big reason for suggesting the short barrel shotgun, as well as the 45/410, is that I have a toddler in the house. If something goes wrong and there is a struggle, I don't want to worry about a shot going through the 7 foot ceiling into her room. A pistol will, no question. A light load in a short barrel shotgun won't put her at nearly as much of a risk.
There's also the FHN 5.7mag, if you're concerned about how many rounds you have. Holds 20+1 and will tear through a bullet proof vest like it's a pillow.