I think I would unload the Saab because it may kill you worse in the future. Cost doesn't seem to be your issue though. If your motive is reliability and downtime, still get rid of the Saab.
You took the insurance off one of the cars in December, but for unknown reasons, you failed to mention which one it was. You must have had a gut feeling that animated that decision. That's what you will end up doing regardless of what anybody come up with here.
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