Browning isn't a bad choice. I looked over new 'Satin Hunter' 12ga O/U with 89mm chambers and Invector Plus choking for 1k. One can nix all sorts of critters with that piece ranging from sparrow to ostrich and everything in between. One would have to be a bit to cook off 3.5" mag in that thing, but they could if they chose to.
If I wanted a classic auto I would go with now nixed Browning auto 5. The best ones are late production Mirokus with Invector Plus choking. Better steel and capable of handling ALL types of shot.