[Giller]

To each there own on the S model. I've got a base, yet have never complained once. Still blows the doors off most other cars out there and is more than I can use on our Canadian roads.
I would always recommend getting the newest car you can afford. No matter the km's, age still plays a big part in the condition.
That being said, buying a Porsche isn't much different than other cars. Water pump, suspension, engine mount, brakes....
Find a car you like and spend a couple bucks getting a PPI done at a reputable shop.