hogwild, i am in a similiar position. i had a 08 sequoia that pulled great but drank gas like crazy. it needed service at the 90K area along with tires and brakes. i did not do all the repairs and bought a 06 land cruiser. ( always loved the way they drive). it pulls the boat fine but still drinks gas.
i have been debating on going with either a audi q7 tdi or a touareg tdi as azx9 recommended. found a nice 09 q7 with low miles but concerned about realibity. also like the touareg but would want a 2011.
maybe azx9 will chime in on this part.