OOPS, just looked it up and it seems the X5 just gets by with a GVWR of 6000... "Hair of your chinny chin, chin..."
GVWR are listed below at this link:
http://www.gonecamping.net/stories/tow_ratings.html
Sorry mambodoc for leading you astray. Hopefully this tax deduction doesn't influence your decision between H2 and X5...