Rim question

Hey guys so i have a quick but prolly a stupid question about rims on my 2000 A4 1.8T Quattro.
 
I wanted to get Stock OEM B5 S4 rims. I noticed like on ebay that they came in 18's and 17's.
did the S4 come with different size wheels? I was really hoping to get 17's because my plans are to get Bilstien shocks with HandR sport springs. and living in the midwest we can have bad roads with pot holes. dont want to bend a rim.
 
also...is there a nice wheel dealer that alot of people use?
 
thanks for your help guys!
 
this is a pic of the rims i want.


Thumbnail Image



Thumbnail Image

The B5 S4 used the 17" version - later S4s used the 18" wheel.  The design is the same, and I believe either will bolt up on your car.