If you have seen my previous post, I am new to the Porsche world and just bought a 1999 Carrera 4 Cabriolet. I have gone thru the car cleaning it up and am currently working the stereo system over. I am also looking for some wheel options to personalize her a little bit, preferable used. What models are compatible with the 1999 996? Caymans, Boxters, 997's? It currently has the original 17" wheels which are ok but looking for something a little wider in the rear and a lower profile. How wide can I go and still fit without rubbing? 11"? Thanks, John