I certainly like the Prudence Island Lighthouse in Rhode Island. It's the size we need, very colorful and supported by a lighthouse group.
http://lighthouse.cc/prudence/index.html I also like the Mayport Naval Station Lighthouse that Daniel suggested. We would have a one of a kind in this light as it is not open to the general public. I know that Daniel and I could get some pictures though, because I just happen to know a retired Coastie that could get some good pictures up close and from far away.