Obviously chat's boring, so just like your choice if someone else nominates it, or reply with artist and album title.
I think it's A Tribe Called Quest - The Low End Theory.
Enter the Wu-Tang (36 Chambers)
Insane Clown Posse - The Great Milenko
Talib Kweli & DJ Hi-Tek - Train of Thought
Probably RTJ2 or the kanye/jay z one.
Or Goldie looking chain
Outkast - ATLiens
Public Enemy - It Takes a Nation of Millions...
Kendrick Lamar - To Pimp a Butterfly
Digable Planets - Blowout Comb
Deltron 3030 self titled or Absence by dalek are close
Clipse - Hell Hath No Fury
New Kingdom - Paradise Don't Come Cheap
was gonna say Deltron. Probably my favourite at least
GZA/ The Genius - Liquid Swords
The aforementioned Deltron 3030 - self titled, or (if you ignore the pointless remixes bogging down the tail end) Fugees - The Score
My Beautiful Dark Twisted Fantasy