2011 Audi S6 Prestige quattro 4dr Sedan AWD (5.2L 10cyl 6A)
This is a very special car that will never exist in this form again since the Lambo/R8 V10 drivetrain will be replaced by a smaller, supercharged engine in the next iteration of the S6. And while it will no doubt outperform the current V10, it will be a much more generic experience. This car is simply a great overall value in this class all things considered (V10, AWD, Audi interior, loaded with options). And you probably will never see yourself coming or going on the road.
V10, AWD, MMI... simply loaded with features. Beautiful inside and out.
I wish all-season tires were on option for the gorgeous 19-inch wheels. Mileage isn't bad considing the engine, but a 7 or 8 speed transmission would help.