Looked an the usual suspects - E550, 550, A6 V8. All nice cars, but none of them had the balance of exterior design, interior style, performance and value. The 2011 MB has no style, BMW is way overrated and need to learn how to do an interior and the Audi needs to be updated. Just look up the performance numbers - the Infiniti has a great ride and is luxurious.
Performance, looks, value and quality. The best overall car in its segment.
Would like a more "throaty" sound from the engine. And, you don't buy at 420 hp car for gas mileage! You know, they do offer a 340 hp V6. Don't blame a car for your stupid choices.