Welcome to the forum Smiffy, it is indeed a good introduction for a new member
Your gold chrome wrap is not to my taste sorry - I am two years younger than you so it is not age related but at least I am not being rude about it (yes I read the whole thread).
Regarding the price of your wrap it would have indeed been quite expensive. Chrome wraps cost more in terms of material per metre as you mentioned but also fitting the stuff is an absolute bast@rd because Chrome wrap does not stretch like matte or pearlescent wrap so it takes more time and skill to install especially on a curvy car like the GranTourismo
Would I buy a wrapped car? Depends on the wrap, I don't mind the pearlenscent wraps but generally hate any matte finish on a car. There was that blue chrome wrapped GranTourismo on the market a little while ago which I did look at more than one time however I do like having real paint and clear coat lacquer to adorn so the colour underneath would have to be something other than black, dark blue, silver (which are all UK resale colours) as I would eventually take the wrap off to enjoy the new paint underneath
Anyway... forumer has stuck a direct port Nitrous system in their manual 4200 and seems to be a good way to gain 150+ BHP for £5k if you don't mind sacrificing some room for a bottle of laughing gas - I wonder if you have to put one of those stickers on your car stating that you are carrying pressurised canisters lol