I really like the colors you have used in design #8. Would you mind to try using sign as it is in #8 however text as in #5 please. What about slogan below in the blue color?
Would you mind to to try to change #12 and #16 using a bit thicker font please. However if you think that it would destroy your design then don't do it. At the end of the day you are designer not me.
All of your designs are fantastic - I am not sure which one to take in to top 5. I am looking at it with a few people. I am looking at how would they look in printing.
Would you mind for a comparison sake try with retuning the letters DMZIT. A bit bolder and maybe with shadow. It may work or not but hard to imagine unless we see it.