Crabcake,
You should listen to E5 - many people have written negatively about it since it doesn't have the chants like the other albums. In fact, many of the tracks are hippier.
The track, "Boum, Boum" is not a soothing track at all. The title track, "Yoyageur" is very hip and includes robotic voices that take you in a trance but nothing like the soothing, melotic tune of "Sadness".
In fact, Cretu admits that E5 is a lot different than other albums and that he has taken a different approach in this album. He is quoted saying that anything less would be repeating himself and that is not what he wanted to do with this album.
Check it out! I had to listen to it a few times before I 'felt' the Engima pull and was able to really get into his music. Sandra's voice is limited on this album, only to be 'heard' on the final track!