If you're looking for home defense I would look at the Mossberg 500, Rem 870 or the Mossberg 590 a1 if you want to spend a little more. Get something with an 18"-20" barrel for maneuverability.
The Mossberg 590 A1 is/was used by the military. It's the only shotgun that passed the 3,000 round torture test. The model I own has the speed feed stock that holds 4 more shells. With a side saddle I'm able to put 19 rds on the gun. Also has a bayonet mount for when things get a little crazy.