^ yeah you got it spot on.... thanks for defining the classic

i'd add:

Eminem - The Marshall Mathers LP (brought something new original, and lyrically strong with lots of emotion and)

Aesop Rock - Labor Days (do I even have to give a reason?)

2pac - Me Against The World (meaning, raw emotion, good lyrics)

Immortal Technique - Revolutionary Vol.2 (great politics and meaning, dope delivery and lyrics, excellent wordplay)

.. just some of my personal favourites that i think deserve a spot