Loreena McKennitt has been one of my favorites for a while. if you've already listened to samples of her later stuff, then you know that her later CDs really get away from the Irish songs from Elemental and move to more Mediterranean influences. I love it but it's a big shift from Elemental. I particularly like her Live in Paris and Toronto CD release from 94.
And, for my money, her music sounds best on the GS1000 and PS1000 Grados. her music is full of overlapping, layered percussion and rhythms. Big soundstage helps identify all the supporting acoustic work and provides the appropriate sense of scale. But the SR and RS Grados will highlight her voice to a greater degree, as you might expect..
I dig her, too. My Mom was into new age and Irish music...although I think she kind of transcends the genre. I like the Book of Secrets as well.