I love the first one, the others don’t even come close for me. Only problem with it is readability (I knew it was a J and an M because you told me). If you were to have it next to your name that shouldn’t be a problem though.
Very nice and clean… My only suggestion is that when the logo scales to a smaller size, the thin color edge (eg: versuch8..jpg) the color will disappear. Try and reduce the size and see if all of the qualities you want visible are retained.