I really like your entry 6 and 5. See if you can play around with entry #4 more. I like the colors and the BWR in it. Maybe try to make entry 4 a little more like 5... Good work.
If you have any other revisions you would like to see let me know. I'm sorry I didn't get a chance to also participate in your ChiroRacing contest. I know I had some good ideas for it. I just got busy with my printshop and didnt have time to play around with the ideas.