I guess it all depends upon your local situation and your local laws regarding use of deadly force. In some locales in the US police will delay responding to home burglary alarms for a variety of reasons. As for shotguns or a carbine without a suppressor if its dark in the house you are going to temporarily lose your night vision and your hearing with the first shot. Not good. Something quieter with a small flash signature that you can wield while on  the phone makes sense and it should be useable by your wife or gf in case you are incapacitated.