Lots of good ones out there, but I've found if you stick with the "B's" you really cannot go wrong. Browning, Beretta, and Benelli. Some have some good spin off or affiliated companies too, like the Browning/Winchester or Benelli/Franchi relationships.

Get one that fits you, shoulders right for you, and overall just feels good.

That being said, I wouldn't trade my Browning Maxus for any other shotgun at this point in my life. Been 100% reliable now since I bought it new in December of 2009.