I drive a Navigator which has good room but not so good on mileage. You might check the Ford Flex which is newer and has a hybrid version I think. Also the Scion xB although a little weird looking I've heard is good for taller people and should get good gas mileage. Finally, don't discount little cars like the Mini Cooper. It actually had the second most room of any car I looked at. Good luck on your hunt and make sure to report back to us.