Heh, yeah that is what I ran into when looking for a new car, they were charging up the nose for the coupe. Of course the Sedan wasn't out yet at the time, but seems that the sedan's presence didn't change that.
I did offer to my wife to get a 2006 Subaru WRX TR instead of a Miata as a "here is a car I would be happy enough with and a 4 door" offering. Fortunately though she told me she wanted me to get the car I really wanted (I prefer 2 doors personally). Boy do I love her :)