I bought the 4 years service plan and just noticed that I only have 2 days left to decide on the "4-YEAR EXTENSION" for another $2,000. What is everyone else doing? pairtrader, gpetti, mayhemm, and others -- Are you buying 4 years, 8 years, nothing? Do these cars really need service? 4 years made sense but do I need another 4? Help!