Personally, I wouldn't bother.
Any paint film dulls the finish and you can see the edges as clear as day, which IMHO spoils the car. Sure, some are better than others, but they're all visible and dull.
The posh coatings are fine, but I wouldn't go down that route as you can achieve the same results with a bloody good scrub and LSP. Also, as above there's zero protection against stone chips.
It's a nice car matey, don't ruin it with films.