Sometime in the mid 1980s, I bought Shahram Nazeri's "She'r va Erfan" (poetry and mysticism). It was one of the first music tapes produced after the revolution. And what an outstanding production of Iranian classical music it was. It is still one of my all-time favorites.
You don't need to be a mystic or a Rumi fan to enjoy Nazeri's singing and production. It will gently make your head shake and your mind twirl like no other.
I could not find a copy of "She'r va Erfan" here in Berkeley, California. But luckily I did find his "Gol-e sad barg" (The hundred-petaled flower) at a local Iranian store, made shortly after the amazing success of "She'r va Erfan". Here's a selection:
Gol-e sad barg
In RealAudio format. Get it here.