I don't jump into the dumb Remington bandwagon. Regardless, the bet hunting shotgun, IMO, on the face of the earth, is the R870 Wingmaster. Note that I said Wingmaster, and wingmaster only. Fit, finish, looks, comfort, it wins in every respect.
For a defensive shotgun, it's the M590A1, the #51663. Accept no substitutes when you need it to cycle and fire 100% of the time, without fail, and you could bet your life, the life of your family and all your belongings on that shotgun cycling every shotshell and firing every single one of them from here to the end of shotshells.
I can go into detail for each choice, but for now, as a hunting gun, 870 wingmaster, and as an everything else gun, 590A1.