An Audi RS6. Man, I remember the first time I saw one. It turned out to be my friend's dad's company car! He is the CEO of BlueCross/BlueShield of Minnesota. The car you saw was a 2003 RS6 (they only imported about 300 of them to the US, that year only, for about $90,000). I saw one about 20 minutes outside of Minneapolis 2 weeks ago while on spring break (you know how fun it is to go NORTH for spring break
, but it was fun anyways).
My friend's dad has an RS6, M5 (also the company car), an X5, aZ8, and a Thunderbird. They are loaded, but I'm sure I don't need to mention that!