Another option, if you can find one is a Saiga.
Another option is a Stoeger. Some say the quality is horrible, but my over and under is flawless.
As for the 10 gauge comment, I doubt the op wants one if he's looking for a 20 gauge. And in my opinion, opposite of what everyone says almost, the 10 gauge doesn't kick all that bad. Yes, it's much harder than a 12 gauge but it's still very bearable. I shoot 8-10 yards every now and then without getting too sore.
I don't like recommending guns I haven't dealt with but since you are looking for a 20 gauge I'm guessing you want a light gun with low recoil? What about the Winchester autos with the fiberglass barrels? I've never shot or even handled one, but I think this is something you should look into.