To start with, I am NOT selling my M Roadster. It still too much fun to be legal. But I am getting close to picking up an Audi Quatro A6 for my "goin'-to-work" car. Does anyone have experience/knowledge either pro or con the A6? My concern is regarding reliability, cost of ownership (vs say a Lexus or Acura)and service in the U.S. Thanks in advance. Roger S.