I have a 870 Police Magnum. I love it, but I don't own or have shot any others to compare it to. Bud's Guns currently has some police trade-in 870 Magnums for $270. They don't say "Police". But they'll shoot 3".
http://www.budsgunshop.com/catalog/p...s_id/411537360
or Wingmasters for $230. 2 3/4" only
http://www.budsgunshop.com/catalog/p...s_id/411537363