Out of the 11 entries so far I like yours the best. The things I would change are that I would put in the actual Ford and Chrysler logos. And I wouldn't use the "best deal in town" if anything I would use our website address watertownfordchrysler.com or our slogan is "One low price plain and simple always!
Also our license plates are a neon yellow just as a reference. So its much brighter than the backgrounds that are being used.
Also as a note if I were starting fresh I would try to have more of a automotive theme or background.
I don't really care for the grill on top. Just wondering what we could do to do with a motorsports or car theme with this design. Also if we could add some different colors to the "Watertown" with the yellow background that would be of interest. The reason we use the neon yellow background on our plates is it makes them highly visible and people can see them from over a city block away. We use to have a white background and when we switched to yellow I can't tell you how many people commented to us that we must be selling a lot of cars because they see our plates everywhere.