a couple of other classics were left out:
-Boogie Down Productions : Criminal Minded '86
-Ultra Magnetic MC's : Critical Beat Down '87
-Public Enemy : It Takes a Nation of Millions To Hold Us Back '89
-Slick Rick : Adventures of Slick Rick '89
-Jungle Brothers : Straight Out The Jungle '89
-De La Soul : 3 Feet & Risin '89
-NWA : Straight Outta Compton '89
-Gang Starr : Step in the Arena '91 & Daily Operation '93
-Tribe Called Quest : Low End Theory '91
These albums along with the others mentioned are all must haves!
Metic Historical Foundation