If Porsche would give the Cayman enough power (say, 450hp) to bring it up to par with the Astons, I could see no reason to drive the Aston. If you want the plushness of the Aston, that could be taken care of with an interior upgrade option. IMHO, horsepower and some suspension tweaking is all that is keeping the Cayman from being the best sports car on the planet!