Thanks Bobby, thanks Pubul57, I really appreciate your comments!
I live in Germany, where the brand Merlin is not well known. The boxes are more expensive too (the MXe starts at 13.500€, which are about 20000 USD using the current exchange rate). But I heard an MM without "e" in an friend's systems, which I liked very much. I am an audiophile too always seeking for the absolute sound, therefore I like highly resolving speakers that do not mask important aspects of the music or colour the sound.
There is an offer for an used MMe on the German markets, latest version 2 years old. Since I have SS (Alchemist APD24/APD25, very rare amplifier combination, that sounds more like tubes), maybe I should try the MMe. At the moment I have an Audioplan "Kontrast V" and an (active) Moll Audio "Sirius". Both brands are unknown on the American market.
Bobby, thank you for explaining me in detail, what are the differences between both versions. Even with an extensive search on Audiogon and on the Merlin website I didn´t find the information I needed.