Oh man, that's tough. Um, if you go to the Channel-Ai blog Celsius005 has done some really fantastic reviews, and the songs are also available to listen. Here are the links:
Sanctuary
Primary Flowers
From Sanctuary, I really like subete, blue and tsuki. From Primary Flowers I love KISEKI ~Song of Love~, Gloria, and Wings to Fly ~Tsubasa no Kudasai~. But I love both albums in their entirety. If you enjoy contemporary classical and New Age, then you'll like Kanon
Oh, and if you want to hear any songs from recent albums (like the Christmas one or her Wings to Fly single) just let me know
