Must have: Sport Chrono and heated seats. As roadtrip says, they are expected on a car of this level. It's actually astonishing that a $130k car comes without heated seats, even if folks in Florida don't use them. On second thought, maybe not for Porsche, which always seems to find a way to charge the customer for something that is included for free in cars a fraction of the price.

Really, really nice to have: Adaptive sport seats, LSD, and SSK. I wouldn't buy another Turbo without them, but when push comes to shove, I don't think they are must have.

Owner preference: everything else. Icing on the cake.