I would encourage anyone considering purchasing tires for their
Vanagon to review the buyer comments on the Michelein Agilis at Tire
Rack:

http://www.tirerack.com/survey/SurveyComments.jsp?additionalComments=y&tireMake=Michelin&tireModel=Agilis&commentStatus=P

It was my experience too that if you want stability, responsiveness,
and manuverability -- especially at highway speed -- reinforced
sidewalls are essential and anything else is just mushy.

Does anyone run tires other than the Agilis that address this well?