I just bought the last chapter pack last night, now my collection is complete(thanks in large part to putting chapter packs on my Amazon wish list before Christmas)! I currently have them all in 9 card sleeves in order with 2 groups (Core set + expansions, the other is chapter packs) then by house, then card type. So now I have a stack 5 inches tall and I am looking for some cool boxes to store them in (I don't like binders).

Does anyone know where to find some boxes for storing sheets of cards with AGOT art on them?

I don't store mine in binders, nor in 3x3 sheets. Mine go into my old Star Wars boxes, typically sleeved. The SW boxes are so perfect for storing cards. It was a brilliant design, much, much stronger than the boxes we get for the deluxe expansions in this game.

Cards not being used get stored in a 3 ring binder in 9 card sheets ordered by card number and set. Cards in decks get stored in an ultrapro portable gaming case .