Looking for suggestions here. I grew up shooting trap, so pretty much learned to shoot with trap grade shotguns, and used the parallel comb and trap style rib for all my shooting, whether it be trap, upland birds, ducks, etc... Over the years I began to shot trap less and less, so varied my shotgun style to shorter barrelled shotguns with field style combs, and noticed that my shooting degraded the further I ventured from a trap style shotgun. I find myself wanting to start shooting shotguns a bit more again (a little bit of everything -- trap, sporting clays, upland birds) and am thinking I need to go back to my roots and get a good autoloader with a parallel comb, 30+ inch barrel, and ventilated rib. With that in mind, I'm looking for suggestions on good, 12 gauge autoloaders set up with at least those 3 elements. I preferred "used" for cost reasons. Ideas?