I like what you did with #50 - I'm ranking 50 because of the lettering, squiggly line under the graphic and colors.
I really like #48 also with the metallic texture to the lettering - very nice - but I think it's too much with the text. Perhaps just the initials done that way?
#53 is not my favorite font but I like the look of it with the squiggly - can you combine 50 and 48, and 53 squiggly with 48 initials and #50 font?