One of my favorites, ever:
Tsem Tulku is awesome.
This greatly helped clarify my understandings of rebirth. Listening to it the first time, it was as if I was listening to something I had already heard a thousand times before.
Tsem Tulku is also one of many Tibetan Buddhists who give me a a clear basis upon which to refrain from sectarian slander (from the standpoint of improper contrast with Zen).
Perhaps my Tibetan friends might do well to look into find some good Zen teachers too?