The Innocence soundtrack isn't very good as stand alone music, and neither was the one to the original film (IMO). Both only pretty much have one or two good tracks (The dollhouse tracks on Innocence and the main theme on the original movie). The GitS:SAC soundtrack is brilliant though, mainly because that has proper songs, wheras most of the music on the movie soundtracks is pretty much composed to fit as background music in the film...which it does very well, but it just doesn't work to listen to it on its own...

I dunno how the sound is on the new series as I haven't seen it yet but I hope its as good as the first one...