I don't really listen to anything that I'd call new age...I do like ambient music though. Right now I like Sigur Ros and Dead Can Dance.
Have you listened to Rasputina, Loreena McKennitt, Hayley Westenra, Zoe Keating, or Black Tape for a Blue Girl?
I also don't mind the music written by Clint Mansell, of Requiem of a Dream fame.
Some of them may not have the spiritual lyrics, but they have an ethereal, classical, feel to them which I like.
It might also be helpful to do a wikipedia search of the bands you really like or a genre, you can usually find a list of similar bands that way. I've done that in the past.
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"The world is but a canvas to our imagination."
-Thoreau