my absolute favorite shotgun is a 2 3/4" model 12 with a 28" modified barrel. Its the gun i'll have when i open the kansas and missouri duck seasons on saturday, it's also my dove, quail, pheasant, and occasional fall turkey gun. i had the good people at simmons install a left handed safety on it for me. it was roughly 60 bucks.
my experience has been that the newer pumps like 870 and mossbergs do not have a tight enough fit to keep the gasses from chamber out of my eyes. i've never had that problem with my m12. i still have to deal with the empties flying across my line of sight but with the tight chamber and a lefthanded safety that gun is passable for a lefty.