 My Infiniti G35x is the best car I have ever owned.  I used to be a Turbo Volvo owner until I took out the Infiniti for a test drive.  When I got back I bought the car!  I have had it for 4 years and still love the car.  It is very quick and responsive.  I find it very, very comfortable (as do my passengers).  The cost to own it is reasonable although it only get 20 mpg no matter how aggressive or easy I drive.  I will always be an Infiniti owner....That should say it all!