I love my Mossberg 930 SPX. Something about 8 rounds semi-auto that just gives me a thrill. For those who mistakenly think the sound of chucking a round will cause your attacker to crap their pants and run away all I can say is do you really want to bet your life on it? If you don’t already have a round in the chamber so all you have to do is flip the safety, aim, and pull the trigger you will probably die. Its as dumb as going conceled carry witjout a round chambered. When the SHTF most people get rattled. Only frequent training and a fully prepared to fire weapon will help you overcome an attacker.
I think that's overstating things a bit. If you want to keep one in the chamber you can do so with either a pump or semi - there are arguments for both ways. Whether to go pump or semi is merely a matter of personal preference both are fine shotguns.