Insurance on pins should be covered under the contents portion of your HO policy. Be sure that the amounts listed on your declarations sheet meets or exceeds the value of your collection plus additional contents. Documenting the inventory and value of your collection on a regular basis is recommended. Be sure to actually read your policy, and the definitions of contents therein.
Insurance companies are only as good as they are when the need arises. Allstate is notoriously shady, State Farm has stumbled the past few years and is trying to cut corners, USAA seems to be very good.