One gun to rule them all!!!

[Baylian]

I was wondering if their was such a gun as one that can do it all? What gauge is it? What brand? What action? What choke? Why? I really haven't used a shot gun since I was a boy when my H&R 20 gauge single shot killed lots of doves and some ducks. I reallty just want a gun to have one in case I go hunting something that requires one.

Thanks in advance, TJ