I loved the music mister episode. I bought the soundtrack on amazon.com after I finished watching the episode.
I listened to the songs and downloaded them to my computer and I still can't get those songs out of my head.
I also loved the last episode where Mongul forced everyone to compete in that "Battle Race" episode. You know, the one episode where Joker was like the Race Announcer while competing and Batman was more of a dick when he was concerned about winning.