You should look at what each management company offers. Depending on the size of your property you can get different services provided. Also you should find out if they carry extra insurance as well as what time they are on call. Giver a call as I manage properties in the Boston area and can offer some assistance.... more
I'm not sure what records you are asking about.
But to get mortgage and lien information - the registry of deeds.
to get tax information the assessors office,
to get past listing and sales information your buyers agent.
to get information regarding the building itself the cities building dept.