I'd keep the bonnets vents as they are and spend the money having the calipers refinished in BDE blue and swapping the centre caps to black or union jack design.
Again, personal taste, but I would gloss black wrap the side sills as this would then show off the 'waistline' of the car. I always think the bodykits in body colour make the car look a bit fat.
Stunning looking car, enjoy
regards, Paul