I had a 2001 audi a4 1.8t, had a chip put in, borla exhaust, K&N cone intake, bilstein shocks with H&R springs, 17" wheels with michelin pilot sports....i have to say that the BMW 330 ci is the better overall car. The handling of the Audi was superp, but BMW is better. The maintenance was like BMW's, full service maintenance was done under warranty. The chip was never detected as it was an APR chip. If I had to make a choice today as with what car i would go with, it would be the BMW with a good set of snow wheels and tires.