As a road car you may have a point, but given the relative costs I would think the 350 could give the Aston a run for its money.
As a racer, the Nissan looks every bit as good as the Aston and points towards a brighter future for GT1 with the new Ford GT and the expected Lambo.
The Vette, Aston etc have been good value, but the time has come for some new blood.