My voyage into Tibetan music so far consists of a few YouTube videos, Nonesuch Explorer's Tibetan Buddhism: Tantras of Gyütö - Sangwa Düpa, and this - but for what it's worth,
this is the best material I've heard yet. I wonder whether it's just a result of the sheer
numbers involved in this recording (in terms of vocalists, instrumental performers, and
instruments), or because it's ritual music specifically, but this is much more absorbing and
involving than the plainchant-esque meditative drones that makes up most of what I've heard
so far - there's a real sense of movement about this that makes a big difference to the
listening experience. Great stuff, highly recommended.