RE: Gas vs Inertia...
I don't like the SBE IIand I have one, buy either the Winchester or Berretta. The Benelli does not have a lengthened forcing cone or overbored barrel the other two do. Beretta and Winchester you can get chokes and recoil pad and other parts from the factory, benelli forget it. I think the winchester and berretta will pattern better, tell you in a week.
But if you dead set you can have mine for 1100.00, it's barely used. I can send pictures.