Savage 220 as was previously mentioned. I shoot 3" Federal Trophy Coppers on mine and it's a deadly combo out to 150 yds+. With the bolt slug gun you get the accutrigger which is light years ahead of any pump or semi auto. I used an 870 for 6 years and a Winchester 1300 for 9 years before that and am kicking myself for not getting the Savage when they were introduced. They are that much better for a DSG.
Looking at your list of "nice to haves" Boyds makes wood and laminate stocks for the 220.
"I have too many guns," said no one, ever.