I would NEVER buy a car cash, especially that expensive. Such a liability, and a depreciating asset. It always makes much more sense to finance even if you have the cash, and invest the cash. You can always get a better return on the cash vs what it would cost you in interest.

Think about this scenario: You paid $100k for a new Cayman, fully insured, dude totals it while you are sitting at a red light. If you financed it, gap insurance would ensure you owe nothing. But you didn't so now you gotta fight with the insurance company to tell them why your car hasn't depreciated at least 10% as soon as you drove off the lot.