Buy from your local dealer and build an ongoing relationship with them. When something invariably goes wrong they will be there to help with BMWNA to your benefit. If you nickel and dime them, they will return the "favor" when you are in a pickle.

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2013 Cayenne GTS Basalt Black/Alcantara (Wife's Daily Driver)
2013 Porsche 911 cab Aqua over pebble and agate (My daily driver)
2010 Porsche GT3RS Black Grey/Black Alcantara (Track car)
2012 Porsche CaymanR Peridot Green with carbon sport buckets (Wife's Track car)