Those Ultimate Guard card boxes look nice.
I keep my cards separated into a lot of different sections though.
I keep a damage deck, a fear deck, a weakness deck, a title card deck, a boon deck, a terrain deck, a basic card deck, a hero's name deck, a role deck, a one handed item deck, a trinket deck, and I'm sure I'm forgetting something.
Plus I'm currently running Aragorn and Legolas, so I keep their cards and decks separate also.