Perfin_RK:
Here is my current stage of development of the facing info and stamp pages:


This way, it is easy to run off a new info page if catalogue numbers or any other information changes. The only information I would put on the stamp page is were there are two or more identical looking stamps.
This example is perhaps an extreme example as there are so many differences in perf, date of issue, withdrawal date and watermark.
The stamp pages will be card stock - about 50 or 60#. The info page can be lighter (cheaper?), say 28 or 30#.
The only concern I have is where stamps may be in contact with the printing on the info page, e.g. in situations where hinges rather than mounts are used. The general feeling is that this is not a problem but, for safety's sake, I will probably use clear protection sheets between the info and stamp pages. You have to remember that one generally plans on making a collection page that will last 50+ years. I have some old business documents going back 25 or more years were ink migration is not pretty at all. Of course, printer inks have improved over this time.