First post here - this is a great site and very helpful to newbie Corvette owners like me! Two questions for you all: (a) my current 'vette is a torch red 427 convertible with 6,950 miles. Is this worth holding onto? I have this nagging feeling that it may one day be worth quite a bit as a unique one-year model; and (b) I have reserved a production slot for a 2016 Laguna Blue Z51 convertible M7. The navigation/performance data recorder option is $2,250 up here in Canada and I don't think it is worth getting (I would never use the navigation and the PDR seems like a toy I'd use only a couple of times. Any thoughts on this? Many thanks!