#15 is our favorite out of your entries, however the CM is a little hard to discern with the backdrop. Is there some way you can modify it to make the letters pop more? Also, the "Event Design" typeface will have to be something a little more modern - a sans-serif font with a modern edge.
#71 and 70 really took into account our feedback, and we appreciate it. I think our main problem is that the C and M are just too intertwined and it's hard to tell what the logo is saying. Don't know if you have any ideas relating to that but, if so, let us know!