Forget the US crash test sites. They give great ratings to vehicles and once they are tested in Europe (more realistic testing) they cars buckle.
http://www.euroncap.com/
Check out the test results for the 2007 Chyrsler Voyager. IIHS says that it is "acceptable" overall. I think you will be suprised by the EURONCAP testing outcome.
http://www.euroncap.com/images/resul...0datasheet.pdf