Hello, I just wanted to give my two cents regarding storing Eldritch Horror w/all (and future) expansions.
Use modular storing boxes - they are infinitely expandable. They fit in a rack, and the individual boxes can be placed on your gaming table. The only thing I don't use these boxes for is the various boards, rules, character sheets and Ancient One sheets (these are kept in the main EH box).
Pros:
Setup time is minimal.
Everything (including monster "cups") is sorted and ready for play.
Boxes fit sleeved cards and tokens in all sizes.
Cons:
Boxes are expensive
Boxes are ugly, compared to "arty" alternatives (but I love em!).
You will probably need additional inserts to get the right amount of boxes in the right size.
This is the line I got - I'm sure there are other alternatives out there:
http://www.raaco.com/Assorter-1602.aspx
P.S. I wanted to upload some pics from my own setup - do I need to link to pictures stored somewhere else? I just couldn't find a way to upload images..
As of now, I use 5 individual cases with modular boxes. Thats for 10 Ancients = All expansions including Egypt.
Cheers!