Best gallery script?

[P.Jackson]

Im looking to setup another vbulletin forum , but before i do i ould like to know which is the best gallery site from experiance to add?

My website will be a adult website im currently using IPB so switching will be easy , we currently have over 2000 members who upload images of themselves and as couples , My girlfriennd actually runs the site and here is her ideas.

She would like a gallery as the main website.

Pictures - Normal users can view a limited number of pictures before they have to upgrade the membership to a paid one

Videos - Users can view most vidoes if under 2 minutes the longer ones would have to be another membership

It would be another plus if accounts could also be merged with the vbulletin database so users would not have to keep logging into both scripts.

Any help really appreciated