RE: Gas vs Inertia...
I like my Stoeger model 2000. It's inertia operated. I'm under the belief that inertia is more reliable and gas has less recoil. I may be wrong though, as I've never tested many gas operated guns. The Browning Gold is actually my favorite gun. I can't complain about my m2000 however. It's old faithful. I think gas operated ones get dirtier.
Inertia has my vote but I've got nothing against gas.