Just bought a certified 2012 Infiniti 37x AWD off lease a few months ago and honestly it is the best decision I made. After looking at lower than expected consumer ratings for BMW, Audi A6's minimum $5,000 more price tag and Lexus ES350's nice but favorite drive of gray haired folks, I gave Infiniti a try and honestly I couldn't be happier. The overall value of the car is bar none the best out of all mid-sized luxury models. As a previous Maxima owner, I was looking for a more luxurious but sporty vehicle that doesn't look like a Nissan Altima and this car must be seen and driven in person. The performance is a mix of both BMW and Acura, while the cabin's interior cannot be compared to anything but Lexus all with all wheel drive with the bells and whistles to boot. The body will grow on you and the best part is the car is that it's uncommon and looks 100% better than the previous and more box-y M35. Once you consider the high ownership costs of a German car and reliability of Nissan/Infiniti, you will hopefully come to your senses and seriously consider the M37.
The cabin is absolutely luxurious, with a very sporty feel. All of the materials feel wonderful (I got the Premium and Deluxe Touring packages, which add a little to the experience). It is whisper quiet, has LOADS of power, and an amazing array of gizmos. In searching, I ended up visiting dealerships in two different states, and they were both really great. I bought it at Cochran Infiniti in Pittsburgh, and they include a pick-up service where they'll drop off a loaner Infiniti and take your car to service (even though we live 80 miles away!).
Power, ride quality, stereo, feel of interior materials, exterior design