I posted this in the Cayenne side and didn't get any responses, so I thought I would ask all the 911 guys this question: We may be purchasing a new Cayenne GTS (stick!) - one small problem - the one we found that we like the best is missing one major option: PCM. What are my options to gain nav/satellite radio/bluetooth/ipod? The dealer says PCM can be added but that it is essentially cost prohibitive - I was afraid to ask how much - anyone have any idea how much? What are the best aftermarket options to add all of this functionality? Is there anyway to integrate the steering wheel buttons in with an aftermarket system? Does anyone know the best people to do this type of work in Chicago or the midwest? Thanks so much for your help!