I like it, Sabbat is the official title for the antagonists in english version (even though it is the same word and origin as sabbath).
I love both your ideas on Malkavian musical taste. For me; I'd play one song on top of another. Something like: In the House, In a Heartbeat - John Murphy underneath Invaders Must Die - Prodigy because to me one of the hallmarks of playing a Malkavain is being of two (or more) minds. A constant background element of some affliction, be it visions, a great plan, voices while at the same time being very much in the present with your other half screaming, fighting, painting, laughing, crying.
Or even an audio book version of Paradise Lost over Clubbed to Death - Matrix Soundtrack.