steve - don't focus on price alone. The most important aspect of a production shotgun is "does it fit you". It wouldn't pay you to get a $600 pump gun and can't hit anything with it. I'd suggest you go to the gun shop or Cabelas, or wherever, pick out 2 or 3 that you like and can afford and try them for fit.
Close your eyes, throw up the gun, open ur eyes, - you should be looking right down the barrel. Pic an object out in the diatance and throw the gun up, it should point right at it. If both of these dont happen, that gun doesn't fit you. Try another.
Some Beretta O/Us fit me good, others dont. As for pumps and autoloaders - the Remington's fit me the best. Unfortunately even better than the Benellis.