I like the way that so many people love to speak with authority , when they haven't a clue what they are talking about. Here is the car. They are not that rare, nor is it the race car. It just seems like the OP is calling the Atenza a Mazda 6 like it is called in the US.
It is the Mazdaspeed6 in North America or the Atenza over seas. I drive one daily and am also looking to add one in GT5 too! This car has eluded me since day one!!