I looked at the Mossberg 930 Autoloader a lot but never got around to buying one. Has a pretty good rep, and lat year could be had for $400 new locally with the synthetic stock. I was considering it for combined home defense / quail &dove hunting, but the two goals are so far apart in hardware (barrell length, # rounds) that I finally decided I'd be better off getting a pump for home defense and an autoloader for hunting. Not that I've gotten either yet (damned economy) but a short barrell HD pump is cheap enough to justify buying it solely for hiding under the bed.
The Remington 1100 is a great gun, but prices tend to run a little high. The Stoeger guns are Benelli copies, and I've been told by more that one wing hunter / skeet shooter that they couldn't tell the difference shooting them back to back. One semi-pro friend says if he could only buy one shotgun for life it would be the cheapest Stoeger Autoloader in 12ga.
I also borrowed an older Browning 12ga autoloader for a quail hunt last year that was a soild piece, but I don't remember the model. It was one that was out of production for several years, and the one I was using had been beat up, used a LOT, and sprayed in rattle can camo. It still put more birds in my bag thatn most of the guys with Benelli's, and it was my first quail hunt. Truly Grassroots, but they seem to hold their value too well for me to buy one.....