Whhels and tires
If you're getting new wheels, I'd recommend keeping your existing OEM ones and using them as snows. That's what I did with my OEM 16x7" sport wheels. I run 215/55R16 winter tires on them (narrow is better in winter to cut through snow, not ride on top of it).
Do a search and you'll see TONS of discussion/debate on this issue.
Regarding the exhaust tips... Do a search for this on Stoney's Links (see my signature for the URL). How it is done has been discussed there. This is also a great resource to know about for MANY A6 questions.
Good luck.



