I have early 1990s vintage pakerized 870Magnum (pre Special Purpose) with Scattergun technologies extension, sling swivels, chromed bolt, birch stock, 20" barrel with front bead. LGS has second hand 2004 vintage 870 Police Magnum with Wilson Combat rear sight, two shot extension, plastic stock, XS front sight 18" barrel. The total prices is $400. My dilemma is whether I should stick with my old gun or upgrade to the more modern Police Magnum with sights better suited to slug shooting? What would you do?