When getting new paysites ready, do you find it is easier to get all the content related work done before or after the main tour design?

Right now ive been working on the content (movies, stories, sets) after the tour has been completed but im wondering if it might be better to get movies and sets encoded/resized before the tour is actually completed?

Your thoughts? Which method do you currently use and have you found one method to be smoother than the other so far as work times etc?

Regards,

Lee