Actually, I recommend
"Nostalgia / Heimweh - music for pictures and sculptures"
It's a work only lasting 29 minutes, and also comes with a dvd.
The music plays over a slide show of images, from the
art exhibition Thorsten made music to.
I can't think of any music Thorsten has done better than this ep. It's very consistent and atmospheric, and sounds like a version of Klaus Schulze in a more traditional rock setup. If you like real piano sounds and feedback guitar in slightly repetitive music, this is the one for you. It beautifully builds up in a discrete, but still very dramatic style. This one is completely instrumental.
I think this one is Thorsten's magnum opus, and better than anything he has offered Tangerine Dream.
It's also available on Curriculum Vitae I, except for the bonus track "morriña".