I bought a 2011 VW Toureg TDI demo for $45K to haul my Caterham in a 7x16 enclosed V-nosed trailer. The Touareg (aka, tow rig) is a very sophisticated, quiet, luxury vehicle. First vehicle I have bought in 10 years that my wife is happy with. I get 32 mpg at 75 mph, 22 mpg around town.
It is rated to tow 7700 lbs. My car/trailer set up is about 3700 lbs. So it tows it with ease, very stable, etc. Towing gas mileage towing sucks, literally, approx 12-13 mpg at 70 mph. It's small enough to drive and park with ease yet can handle pretty major duty when called upon.