So, after having owned my 997.1 for the last 5 years, i am getting the itch for my second 911. the prices for the 2012 991s have started to subside.

What i want - a 911 S... coupe.
Color pref - Silver on black
Features i really need - PDK, Navi, Bluetooth. I have had the sport chrono pack in my current car and have probably used it once, just to try it out. I agree sport chrono, and sport plus etc. help the resale value of the car.

For 2012s, what are the main problems that one should be looking for?

My purchase will be CPO or nothing.