You want to show off then how about something like this: http://www.decalfx.com/windshieldstuff1.html

or this: http://www.windshieldbanner.com/imports.htm

I think they are under $50.

You could do something like Civic Hybrd 55+ MPG in big bold letters.

My hydroponics experiment

You ever notice how hard it is to lip read cartoon characters?
"Crazy is what the sane call Delta Flyer"