Brian and Glenn, I agree, although my preferred sidearms are not in general LE use. Then again, my normal ammo (HST) is.
Police in my neck of the woods carry Glock and Springfield XD, neither of which are my preference.
With regard to what does or does not justify deadly force, it is funny to see opinions change when I find the anti who is willing to let me show them how quickly a competent person could really injure them using nothing but bare hands. I don't actually harm them, I just demonstrate taking a joint to its limit - while carefully not exceeding the limit, or application of carotid pressure until they start to grey out.
Ivory towers were made to be undermined.