I used to own one pxed it in for the rs6
as it is more economical to run
Be very aware that they eat tires (4 every 8000 miles @ £1000 a time + 4x4 alignment) Also any other work requires the engine dropped!! I hope you get more than 21 mpg!!!!
On the plus side they are a great people carrier, better than a range rover and the 0-60 isn't too shabby for a 2 1/2 tonne beastie