#26 - I like the play with lines on the lefty to denote both A and M. I especially have a warm response to the white and blue colors and having everything centralized in a box.
#15 - Very clean. The white background can be seen as dynamic, though that was not my first reaction.
#25 - Same as #15, only a little less so. The dominant blue background does not send as strong (dynamic) a message.