Jayahalasi: "I Read in a list of cars for GT4 that both the '95 L AWD SVX (Alcyone) and '03 B11S Concept were included. I haven't seen any proof of this, but as I do not own the game I may have just not come accross them yet. Anyone Know anything about this?"

(because I don't know how to quote yet)

It could be that the cars you listed in your post are just in the Japanese version of the game which wouldn't surprise me at all. And my 2 cents...I think it's a Supra.