Any of these will do, just add a bit of weight to get them to the 400PP mark then keep adding weight while the car breaks in. They will win easy in A-Spec and B-Spec at 400PP and you get the Toyota and the Scion free anyways.
I use a Mitsubishi FTO GPX, just a regular one. It gets the job done. With 400pp races you can't do much to a car usually, unless the car starts out low in PP to begin with.