These days I would find a used police 870. I have had four over the years and they are remarkably reliable. I still have a couplevof 870's. One is a beautiful 2 3/4 in Wingmaster, another an Express and finaly,a LEO tradein..
With rifle sights, 21" IC or screw choke barrrel a light and side saddles I would think you would be set. If you get one with a short magaine ,it is easy to add to the tube if desired..
I also have had a fondness for Ithaca Deerslayers.We had them in Vietnam and I got some as soon as I got out. Again, very reliable. Not as available as when LAPD sold theris.
You indicated you wanted a budget gun. If you ever want to spend a bit more money, get a Beretta 1301T. I did. For defense I feel there is no comparison.
