Topic: Something really helpful: The Container Store
I stumbled across a place called The Container Store. Its a national chain, so you might be able to find one even if you don't know what I'm talking about.
Anyway, it has an entire section dedicated to collectibles. There are containers and cases for all kinds, helmet replicas, weapon repicas, figures (3" and 12"), pins, miniatures, etc...
I picked up a few things, and I plan to go back after i go over my collection and figure out what I need.