My thinking is to go with a larger frame, at least a a 1/2 ton (F-150, etc) to give you that extra steel and weight around you. In addition, this will get you up higher to prevent thoracic injuries in the even you get t-boned. I'm also thinking as long as the truck had the safety canopy with side curtain bags that blow for like 6 seconds as you roll, that would be a plus. Gotta also have stability control. Have you guys seen much problems with roof collapse on F-150's?