here is an example of how a design like this works in black and white - I hope that alleviates your worries! - I'll work on the colour versions with the changes you requested too.
Thank you so much. The black and white looks good and we like the typography used in #18.
We suggest that we leave #18 as the leader design for now. We would not like to take more of your time incase somebody else are coming up with a concept we like even better over the next couple of days. If we end up granting you the winner of the contest I hope it's possible to play a bit around with the text size and exact text position before you send over the final design.