I have to disagree with AUG. The 870 and the Mossberg are used by the military, and police departments. I think a shotgun is more like fitting clothes, you are the person who has to use it. I like the mossberg because I can look down the barrel and tell if it is on safe. I can also work the action on a mossy faster than an 870. These are preferances that are up to an individual to make. I also like the fact that a Mossberg has dual shell extrators, while the 870's I have seen have just one on the right side.
My father-in-law, wife, and neighbor both like their 870's, and can work them very fast. Our Wingmaster 870 .410 is being used by my brother-in-laws kids, that does not mean that a gun for HD should have as a criteria of being passed on to future generations, when you are fumbling for a safety, and don't get to have future generations. Get the gun that works for you.