RE: Benelli, Stoeger, Franchi Inertia system or gas?
You can't go wrong with the stoeger 2000. It is the best shotgun I've ever owned. I've also hunted a few times with the Benelli 391. It is also an extremely nice shotgun.
One thing worth noting is that the new Stoeger 2000 has a hollow tub in the stock. You can place a mercury tube in there for $15. Claims to greatly reduce the felt recoil. I will agree though that inertia shotguns do have more felt recoil. At least that's been my experience.
Tom