Well, I got to go to a gun store after work on Wednesday and they had pretty much all the major tactical, home defense, and hunting shotguns one could ask for. I got to try out several Mossbergs, Remingtons, Benellis, and the like. The only Mossberg I liked was a Mossberg M590A1 with a 18.5'' barrel, five round magazine tube plus one in the chamber, and a Speedfeed buttstock. You see I have a problem and that is that I'm only 5'6'', but I am also barrel chested. Therefore, shotguns with a medium sized stock and a shorter action, or shogtuns with a short stock and medium length actions work well with me. I'm also cross dominant (right handed, left eye dominant) so it's difficult for me to find a shotgun that has ergos that I like since I shoot left handed.
The only other shotgun that fit me well was the Remington 870 Express Tactical which had similar features as the Mossberg. As it stands, the Mossberg has the better ergos, as well as a better build quality, but lacks many options outside of being just a simple defense shotgun. The Remington on the other hand has crappy ergos that I can get used to with training, but it also has more options for me to choose from should I get into shotgunning outside of home defense. It's a tough call.