feisty

So I now own a beautiful 2012 A4 Avant premium plus with 2-1/2 years left on original; warranty plus the car is Audi certified. I am approaching 15,000 miles quickly and have a decision to make as to the 15,000 mile service. I would like to utilize an Audi dealer for service to establish a relationship should warranty work be required. However after reading many, many reviews of Audi dealers here in NYC area I am frankly afraid.
Basically the 15000 mile is a glorified oil change with some air filter at the going rate of $400 +/- (seems ridicules).
So the question is should I go to a Dealer or an Indy for this work? and who has had relatively good service at a dealer and who is that dealer?

Thanks