I like the Cayman, but not the stupid pricing. Turns out, I'd skip this winged wonder also. Looks very F&F, I don't care if it's functional.
If the design required a wing that large, then there's something wrong with the aerodynamics. The Camaro Z28, Corvette Z06 and Viper GTS only need little ducktail spoilers for downforce, and they have considerably more performance potential.
I'd stick with the GTS, but really I'd skip Porsche altogether and get a Corvette.