Are you all planning on taking your X's in once a year? If so, how many are planning on doing the prepaid option? For the 8yr, I think you save $800 on today's pricing and I'm guessing the cost of service over time will only go up if it changes at all. I don't know the cost of the extended warranty, and normally I never would buy an extended warranty, but with such a high tech car, I'm on the fence. No idea how much it costs as pricing isn't listed on the website, but any thoughts on this too?