Picus,
THought real hard about the Infiniti M35. With the deal on the GS, that will probably make the difference. Looked at the RL, liked the Infiniti and Lexus better, at least from a looks standpoint.
I will probably drive 20K miles or better this year, mostly highway. With that in mind, the GS looks like a pretty good fit. If I want a sportscar, my wife usually borrows a Corvette from her father to drive during the summer. He collects them so there is always one sitting around.
I like the look of the Audi A6 probably best of the cars mentioned, but right now, I am of the opinion, I want no issues, and I am convinced with Audi, there will always be issues. Trust me, I thought long and hard about another A8.
I drove the LS and thought it was a nice car, my neighbor has the Jag version, but I really want all-wheel drive. Driving around Cleveland, Detroit, and Grand Rapids, MI in the middle of winter really makes AWD great for peace of mind. I may only need AWD once or twice in the winter, but when I need it, I REALLY need it.
Thanks,
Sam