The MK-6 is the keyboard version of the Mo'Phatt sound module... and every piece of gear is popular amongst hip hop producers... especially the ones who have unique beats.
I remember T-1 tellin me they (Game Insane) use a couple of the Emu products together to create that sound they got....the MK-6 and the other board which is more towards techno and also the sound module i think its called MP-7......