Malte:
Did you mean to say "photo-album" instead of "photo-book"?
Eli:
I personally would rather use the file-storage/etp combination. I have used it on some sites I have made, and linking the images to the etp is really quick and easy, I would recomend it if you are aiming to create a "centralized file/image management page", which is what I aim for in general. The only downside to this is that you would have to create the three images on your own. I hope my comment helps you.