depending upon date of production:
HD Radio

Given that BMW's are made ala carte, your concern should be on finding a car with the options you want rather than 07 v. 08. Obviously, the length of the CPO will be based on when your car was originally placed in service.

There are some good threads that discuss options.

My 07 4.8 CPO came with every option available at the time of manufacture. The option I like most is the comfort seats. (fyi..it is rare to find these on a sport package b/c you get no credit for the sport seats) Items like HUD, sport package, rear entertainment, navigation, rear climate, etc are all useful at times, but those comfort seats are great day-to-day!

The vehicle is great except for crappy mpg and rear camera. Idrive could be better, but not bad by any measure.