Our dog was too old to jump into our f-150 or a lifted XJ, so we got him an Aveo. With the backseat removed and a piece of plywood shaped for the rear, we have the perfect doggie-mobile.
We bought the Aveo with ~70k miles on it, added taller tires, a 7ball to the shifter knob, and plenty of dog hair, and it has become a daily driver for our family!