Many years ago, I bought an old Sears 16 guage pump from my dad (he didn't give guns away........but would offer them for a good price.) While on active military duty, hunted several years on a military reservation where one had to use shotgun with slugs. That old smoothbore 16 guage would kill 'em dead, but not much good beyond 50 yards or so. Accuracy was the primary drawback. Probably should have invested in a rifled barrel, but after moving to another state where I could use high powered rifles, haven't touched that ole 16 for several years, other than to clean it regularly and enjoy the feel of handling it. Still a good rabbit, bird, squirrel gun, and expect I'll leave it to one of my sons or grandsons at some point.
Whatever you go with, the rifled barrel would certainly be a very wise investment.
It isn't what happens to us, it is how we deal with it, that matters most.