The RS-A's are really more of a 'touring' tire. I've had some shops say that that's all you really need for a car like the Talon. ):

When are you planning on buying, Reza? When I called around a few months ago I think I recall one place that could get me Nitto's, but I forget the name. I'm going to be checking again shortly.

As for the price difference, a lot of places will try to just milk you for the extra money for the 17"+ sizes. They know they have you over a barrel.