I love the orchestral piece that plays as you first arrive and in the "garden" area of Spire.
I don't think I really noticed the music on Haven (except when it stopped. I noticed the *absence* of it). On Haven it changed and flowed with the world around me, appropriate to the setting. But this first piece on Spire, this is the first music I could listen to apart from the game. In fact, I almost don't want to move on into a new area, away from this piece.