There are all kinds of supplemental additions to expand this album into revenues, post cards, booklets etc. It can get as big as you want it. It is a nice album, printed on one side of the page on heavy paper. If the National is not comprehensive enough for you, then you have already specialized and you really need to do your own thing. If you are into MNH collecting, then there are many beautiful, fancy, hingeless albums out there.
Hingeless albums come with mounts.
I would suggest that you write the various makers and ask for a sample album page and literature. Then after you have an idea what you want, shop for price. There is a drawback to most of the hingeless albums and that is they are pretty much limited in scope to the major number stamps. If you are collecting lots of stuff that is only listed in the Scott US Specialized Catalog, then you will have to go with the National and buy lots of mounts. Worldwide collectors have other problems to face when it comes time to upgrade.