Phil, Burnt Weenie has some of the commentary and has the most "experimental" music on it. Chunga's Revenge is kind of a turning point with some more conventional music, still some parody and sarcasm. Waka Jawaka and the Grand Wazoo are almost all instrumental, the Wazoo has a lot of charted horns. I saw him play this live and it was incredible, the players looking a little puzzled at times but a great performance. None of these albums feature the spoken narration style like Overnight Sensation and much of his later work. And oh ya, I love Ruben and the Jets but it is all tounge in cheek 50s music Zappa style.