Thank you "Hyles"... and "kirispupis" BIG thanx on your very extensive description between 100mm and 65mm lenses.
Even macro shooting is split in section and subsections, which is great for enthusiast, and little less great for wallet, but... what a heck... no pain no gain.
I'll start my "macro career" with 70-200 + ext. 2x, and than I'll see to my next heading.
I'll be honest with all of you, MP-E 65mm seems like it's going to be my first extreme macro lens.
Maybe hard to shoot with it, but, I am a very, very patient man, and person who is willing to learn... a lot.
Thanks again for your answers folks.
And now... the drinks