There are limited rims for this car. Its that way with most German cars because they have such high standards and some sort of control on their bolt pattern. There are some great high-end wheels that fit though, but selection is limited. I have these on my car (look for the virus style, under performance):
http://www.fastco.ca/FASTWHEELS%20FR...eel_index.html
There is a picture link somewhere on here of my car with the wheels.
Fastwheels also makes some other styles that fix on an A6, but not that many though. Rims are so subject to a driver's taste. I don't like chrome, cause I think they are too much bling and I prefer subtle, esp. a german car. To me, they are sophisticated performance machines, and to bling em up trashes the luxury sport look and makes em look like pimp mobiles. But, others perfer that look.
Again, with rims, you will likely need tires too.