Danny, do you really believe that shooting one ragged hole vs. shooting 3" group at 15 yards, is going to make the difference in a home invasion? I don't. Things I believe will.
1. Some good glow in dark sights
2. Rather large sights. (rules out target sights that shoot one ragged hole)
3. Ease of use. Remember you scared, shocked, and groggy. I know from experience, with that mix, you better be able to operate the gun by pure instinct and conditioning. Glocks are simple, so are wheel guns. Can't mess that up too bad.
All I know is, the more accurate the gun, the more accurate the shooter is. If I aim center mass with that Kimber, I'm pretty dang sure that at least one bullet is going to take out the spinal column. End of aggression right there.
Yes, you have to have shooting skills, but the best shooter with a inaccurate gun is no better than an inaccurate shooter with an accurate gun. Here is where range time comes in. As far as the rest of your points go;
1. I have night sights on my Kimber.
2. They are large enough for me to see.
3. I spend enough time at the range that I can operate it "by pure instinct and conditioning". As a former police officer, I will probably be pumped up, and groggy, but I'm pretty sure I can take care of business should the need arise. That said, you don't need to have been a cop, or even gone thru the training. A good mind set, and plenty of time at the range practicing different scenerios will greatly improve your chances in a bad situation.