Not to start a flame job here but, How about just getting a reliable weapon and learning how to run it REALLY well. All of the guns mentioned are fine. Each has it's own quirks and operation that need to be understood and overcome.The best is just an opinion.
Very true. One does not "need" a $1,650.00 Benelli to defend your home with. A $250.00 Maverick 88 will work just as well in the proper hands. In fact, for self defense I would trust most any pump over a semi auto, based on the simpler is better concept. My Mossberg 590 A-1 Mil-Spec is capable of doing anything I could possibly want a defensive shotgun to accomplish.
And I could have 3 of them for the price of a single Benelli M-4.I'm not knocking the Benelli, it is a fine weapon. But considering it's priced higher than a entry level Browning Citori, I just can't justify it. Remington 870 Police Models, and the Mossberg Mil-Spec Models are well proven in battle, the streets, as well as in the field, and have been for decades. I just don't see how a person could go wrong with any of them. Besides, you can take the $1,000.00+ you'll be saving and spend it on slugs and buckshot, and you'll be a hell of a lot more deadly with the practice that ammo will buy you.