One more thing to consider is the fact that if you buy a 100K extended waranty, and you sell the car say at 40K, you can get a refund prorated for the unused portion. I don't know if alll extended waranties work the same, but I have taken the refund a couple times. You can also cancel at any time while you still have the vehicle. Most dealers don't tell you this up front but read the fine print.
Life's journey is not to arrive at the grave safely in a well preserved body, but rather to skid in sideways, totally worn out, shouting "Holy shit, what a ride!"