This is what I have as my duty home defense pistol in this configuration:
http://media.photobucket.com/image/glock%2021%20sf%20lasermax/longbough1/G2101a.jpg
The magazine capacity is 13 rounds and I use CorBon 200 grain .45 +P ACP rounds which give you 1,100 fps muzzle velocity and 500 ft/lbs of muzzle energy. A nasty reception for intruders.
Don't you feel the least bit concerned about having a flashlight mounted to the firearm? I know that one flashlight technique is to suddenly illuminate the perp at night and blind them while you have an extra second to identify the target, but doesn't the flashlight sort of encourage an anti-pattern for shooting, and that is, "don't point the weapon at anything you aren't willing to destroy right now"?
I know the urge to wave the weapon and light around in a search pattern is strong, but at the same time one is panning and scanning, they are also pointing the muzzle at what may be a loved one in the search for that Bump-in-the-Night