my top ten favourite at the momment

1. Big L
2. Nas
3. MF DOOM
4. Cormega
5. Lord Finesse
6. Grand Master Grimm
7. O.C.
8. Notorious B.I.G.
9. Mobb Deep
10. Diverse

as for production, id have to say:

1. Madlib
2. Pete Rock
3. DJ Premier
4. Havoc (old shit)
5. Buckwild