AUDI
Dragonfire....do yourself a huge favor and get the AUDI. I have become a huge fan over the years, as has my sister, and several friends. I have an 2006 A4 (got it for my ex, its mine now) I barely fit in it, but the car is awesome. Never a problem and its fun to drive. The Audi is tops in interiors fit and finish and you will love the Quattro,go through anything.
The A6 your looking at is a great choice, I test drove it and fit in it much better then the A4, It also has a nicer interior.
I am not an expert on much, but cars I think I know quite a bit. I have had 12 different cars since I first got my license about 1991. Most new, and that includes 3 Benzes, 2BMWs,2Volvos,2Caddys,etc. And I have been to countless dealerships and test drove everything.
You want pure luxury, power and image go with the Benz.
You want luxury, power and sporty handling, go with the BMW....
Luxury, sport, power the best AWD and beautiful interiors go with Audi.
PM if you have any questions. My sis is getting the new S5, my friend has an S4 and an A8, another has an A6. Audi is making a serious statement right now, remember they are in the same family as VW, Porsche, and Lamborghini. Check out the new Audi R8 they produced(it was in the Superbowl commercial,sick) and the Audi S6 and S8 luxury/sport sedans which have the Lambo V10! These cars are not within reach for most of us, but it gives you an idea of the kind of company your dealing with. Audi all the way brother.
Yes the M35 is nice, but its still a Nissan. I drove the M45, and it was NICE, but it DID NOT have that rock solid German feel you get something designed for the Autobahn. You want electronics, buy Japanese. You want a car, buy German if its in your budget....