The only auto loader I've ever used was a Browning Double Auto, best there ever was I think. Wait, at one time I have I thing it was a mod 48 in 28ga. I was young then and 28 just didn't seen adequate to me.
Come's to buying guns my first choice is generally one that I hear lot's of good about. lacking that, I have to have the gun in my hand to get a feel for it. I'm going out on a limb with my next I think, Dickson SxS. I had a Bernedelli years ago but SxS mode hadn't set in yet. Then down the road more years I got a Charles Daly I really liked. Super gun! My son has it now. Have three AyA's now and the only think that keeps me from getting another is price!
Go look at guns in the action you think you want. The one that would interest me most would be the Rem 1100, seem's everyone loves them. I picked a 12 ga up a couple times and notices two thing's. They were heavy and dumped the MTY case's on the ground! But recently I'd been thinking os a 28 in a semi and guns that caught my attentio were the 1100 nd one I'd never heard of, a tri star. I'm thinking Ill still get one just to fool with and thinking the Tri Star, for no other reason than the way it looks!