Its pretty hard to choose Phillippe, of course the albums like Force Majeure, Green Deserts, and Stratosfear are some of my favorite TD albums. So this Virgin Era woould be my first choise. The following era has Exit, Poland, Underwater Sunlight, Le Parc, Live Miles and Pergamon and IMHO have the same "weight" as the above mentioned. The last period has The Tyranny of Beauty, Goblins Club, Ambient Monkeys, Mars Polaris (ost), Seven Letters from Tibet and Inferno, which are absolutely fantastic albums. Since I do have nearly all TD recordings on original CD's, I do listen to nearly all of the eras on a aweekly basis, and I cant believe that TDs music can be divided into the recording company eras. If you divide TD's music into eras, it should be according to the diferent line-ups and then we could discuss which member had what kind of contribution.
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Lunar.