I own a Stoeger 20ga. It is tough as nails, absolutely reliable, and shoots Remington #3 Buck great. The recoil in the 20ga. is not bad at all.
I have owned a couple of Stoeger 12ga. coach guns in the past, and thought they were great as well, although one of those didn't have a recoil pad. It certainly got your attention when shooting it.
A good friend of mine has a Rossi coach gun in 12ga. We have shot the heck out of it for the last 12 years or so, and it is almost as tight as the day he got it.
I owned a Baikal coach gun with external hammers once that I foolishly traded off. The only down side to it was the action was extremely stiff.
I don't think you can go wrong with any of the three mentioned above. I haven't seen too many Rossi coach guns around lately, but they do pop up on gunbroker in good shape.