A4 wheel size questions...

["Robert P. Wunderlich, DPM" <robert@Wunderlich.com>]

Greetings, fellow quattro junkies...

I just picked up my new A4 1.8TQM last Friday (sport package, sunroof, trip
computer, casablanca white with ambiente ecru leatherette), and I'm looking
into aftermarket rims/tires.  Can anyone tell me if 18"x8" wheels with
225-40ZR-18 tires will fit this car without fender modifications (and
without rubbing in the turns)?  Would 17" wheels with 225-45ZR-17 be a
better choice?

I figured I'd have no problem selling the OEM 7-spoke wheels that came with
the sport package, but one look at the classified section of the A4.org
website makes me realize that EVERYONE had this idea before me.

I'd appreciate any advice from those who have gone down this road before!

Bob W.