The Mossberg is a great choice. Just make sure you have done everything else you can--motion lights, trim back tall bushes and trees next to house, replace with cactus (if you're in the right climate) add the 3M film to help shatter-proof your windows, etc. As you obviously know, the Mossberg gets used when every other level of defense has been defeated. As I've had the opportunity to learn (unfortunately), there's nothing like the feel of a good gun butt in your hand when something goes bump in the night.