I wouldn't really consider Meth and Red a duo, although they do make a good one. But if you re gonna go with the greatest rap duo's, you should name groups that have put out multiple albums. When I think rap duos, groups such as Outkast, EPMD, Organized Konfusion, Pete Rock & CL Smooth and Mobb Deep (to name a few) come to mind. If you wanna name groups that have a rapper and a dj/producer, then you got groups like Gangstarr, Kool G Rap & DJ Polo and Eric B & Rakim. Or there's Tribe Called Quest, which has 2 rappers and a dj. :thumb: