So, I'm going to buy a new car for my wife to replace her Lincoln MKZ, and this is how the list is shaking down, in order;
1) Audi A4 Quattro Premium plus
2) Audi A6 Quattro $10,000 more than the Audi A4 similarly equipped, but comparable in size with her current car
3) Cadillac CTS $10,000 more than the Audi A4 similarly equipped but comparable in size with her current car
4) BMW 328 x drive $10,000 more than the Audi A4 similarly equipped. Don't like the idea of run-flats. Why is everything ala-cart with BMW?
5) Cadillac ATS Beautiful and would have been first choice but you need to be a contortionist to get into the back seat
6) Lincoln MKZ - Wife does not care for its current style - price comparable to the A4

 

I'd definitely go with the Audi A4. Reasons being is it's a cost efficient luxury car. I have an 09 A4 Quattro Premium Plus and I love it. Luxury all around and has a lot of room in the cabin.

Obviously, if you had the extra $10,000 to spend on the car, I'd upgrade to the A6.