Re: how do I decide?
I've shot a lot of competition over the years, and the serious shooters stay well away from inertia guns. Usually the Beretta 391 or a few Browning Golds with a couple of 1100's but mostly O/U's. I use my 391 for everything but upland birds--ducks and geese, sporting clays, skeet, trap etc. I've shot numerous 100 straights in NSSA skeet with it, it's a fantastic doubles gun, it's WAY softer than any Benelli and I once tried to choke it by shooting it to failure; gave up after about 1,500 rounds. I've shot the poofiest 3/4 oz. loads out of it up to 1 5/8 oz. 3" bizmuth and had to do nothing to get it to puke 'em out. That's the one I recommend.
Life's too short to shoot an ugly gun.....