Designing a new sign for a private hire/ Minicab office

I would like the sign to have an eagle in it, a car, such as a silver mercedes or ford galaxy. My companys telephone numbers should be large and eye catching. I have attached a file of our current design and would be able to send some examples of other signs I have seen and like.

I already have a Sign Maker but he does. It seem to have any real artsitc flair and I would like my new Sign to be at least be noticed by my customers ! The new Sign will be 7500mm by 750mm. Many thanks.