Cayenne GTS. I've put a standard S through it's paces and it's a lot of fun for what it is. I just feel the GTS has even better handling and looks immensely better out of the box. Forget the MB and Lexus. They are not enjoyable to drive at all - far too utilitarian.
'02 ///M5 Imola Red / Imola Red '09 335i Alpine White / Coral Red