I assume you're talking about the Pratt 
presentation case.  Those cases are actually the 
best bang for the buck.  However, you should try 
looking for the next size up which is 18" x 24"; 
just a better value for its cost.  I have the 18" 
x 24" case, and it works extremely well.  I've 
even transported framed cels in it (without the 
pages of course).  If you ever get ahold of more 
than 20 large cels, you could always add more 
pages to it as well.  Later.