JMT is another level of hip hop. Thier music, instrumentals and lyrics, has so much depth. They bring that dark mystic sound better than anyone. As for this statement:
"The only thing is that their production is really all the same," I don't know if I would agree. They don't change up thier beat structure much (unlike groups like outkast), but the entire composition of each song is unique. All the diff. vocal, opera, classical music, etc. loops are all distinct (and almost definitely never used before). Stoupe is a good producer. Check out their early LP's (Psychosocial and amber probe), and definitely check Army of the Pharoahs (JMT, Bahamadia, Esoteric, others).