The strange thing about the Syberia games is that I didn't notice the soundtrack much when I was playing the game. I remember the menu screen music, and some of the music when cut scenes played, and Helena's aria, but I don't remember much in-game music otherwise.
I thought the music in Ring was beautiful. Especially the opening.
The trouble I have with Ring's music is that it isn't original. It's using previously written music from Wagner's Ring cycle. So it isn't really what I think of as game music because it wasn't composed for a game. It wasn't even gathered from separate sources, like Faust's music was.