I am looking for a good reliable tactical home defense shotgun, and hoping some of you guy can help me out. I want an 18" (12ga) barrel either pump or auto. My budget would be in the $300.00- $600.00 range. I do realize I am not going to find too many auto loaders in this price range but would like to. So a pump will be just fine. Would like it to be parkerized or a similar finish. Any of you guys have any ideas?