I Gave You Power - Rapping as a gun couldn't be done any better.
The Flyest - I love Nas/Az combo's, and as great as Life's a Bitch is, this boils down to be my personal favorite.
Was hard to narrow it down to 2 in this couple seconds I thought about it, but these were the first to come to mind. Nas is Like, Family, You're Da Man, U Gotta Love it, Book of Rhymes, These are our Heros also came to my mind, many great songs.