As a recent diesel convert, I'll have to say that I love my Duramax.
Any motor that can pull 7000 lbs of truck carrying 5000 lbs in the bed and still drop most cars at a stoplight gets a thumbs-up in my book.
The engine is so good in fact, it almost makes me forget that I'm driving a domestic.
If the Touareg wasn't such a POS, I'd love to have the diesel version -that would be the ultimate family truckster.
On a related note, Audi does most of its cold-weather testing up here. About a month ago, the wife spotted some Audi prototype SUV running around town -it was bigger and boxier than the Q7. Save for the AU rings, it had no other badges on it. 2009 maybe?
I've made her start carrying around a camera for just such occasions.