A few good albums that I don't think have been mentioned:
Mos Def & Talib Kweli Are Blackstar
http://www.youtube.com/watch?v=WiNwTL0HQRI
Blackalicious - Blazing Arrow
http://www.youtube.com/watch?v=NH2bqTc88ns
Also like The Coup, can't say what my fav album is though
http://www.youtube.com/watch?v=OMsEDX9IosU