Nah, Kaena: The Prophecy wasn't very good. The animation was decent, the camera angles kept changing like an epileptic dragonfly, and for some reason the frame rate obviously slowed at several points throughout the movie. A waste of Anjelica Huston's and the late Richard Harris's voices.
The 2046 OST really grows on you. The music didn't particularly strike me during the movie, except for Connie Francis's extremely seductive Siboney and the Xavier Cugat pieces. After listening to it two or three times though, the soundtrack becomes addictively melancholic.