Neither,
The 19" wheels are way too expensive when you consider the car already has a set of 18" wheels and look very similar to the GTD wheels.
The Roof is better value for money when you look at the technology you are getting, but I had a Panoramic roof in a Civic before and found it was of no benefit at all, as it starts behind your head, its great if you sit in the back though.
For £900 I can tax the car for 45 years.