I have an 06 Cayenne S Titanium with 41,800 miles. The factory warranty expires at 50K miles. Is it worth it at this point to buy an extended warranty or go 'bare-back'. My lease is up 1/2012. It seems that most of the work done on the car such as brakes, tires etc is non-warranty anyway. Are all warranty companies similar or is it best to go thru my Porsche dealer? Opinions would be appreciated.