Move slogan out of the conversation bubble. is it possible play with that background wave - love the action looking for something that shows more speed and power. may also want to play a little with the gradation. like it now but a little more gradation or action in the wave may show some motion. #9 shows more action - has the italics and more gradation.
Can the background wave come through the name (ever so slightly)? Or maybe the wave gradiation needs to be more defined. I feel the wave action more in #6.
It would be interesting to see this in the same color as #6 if you think it looks good.
I am not getting much action from the shadow on the left. Do you have other tricks to add action or depth?