Spent some time the other day at the auto show and looked at a C7 convertible. There were a couple of nice things on the C7 I'd love to have on my C4: the waterfall convertible top panel between the front seats, the dedicated space for the soft top along with the trunk lid.
IMO those would be really sweet to add to a C4 but I have a hard time thinking about spending more than my first house (by a factor of 3+) for a car.
One more thing on the C7 - who could work on one themselves? Without a garage with $100,000 worth of equipment, who can do anything on it other than put in some gas and turn the key?
I may not be good yet, but at least I can open the hood and do some of the work myself with the tools I have.