I am working on a photo website for a friend. The idea is to showcase the Quality of the photos... many photos... different categories, etc... I plan to use lightbox 2.0 to display thumbnails which enlarge, But I'm not sure what size I should make the images... What would be the best size images to use? (thumb size? full size?) I of course, want optimal load times while maintaining the best quality... THANKS IN ADVANCE!!