I use the same exact deck box as Hatman, and I've had it for about three years, so I would recommend getting one of those with the legendary birds on them. If you can't find them, then I would use an Ultra-pro one, its also pretty durable.
This is a link to the Articuno deck-box.
http://ecx.images-amazon.com/images/I/514oE8W4FHL._SL500_AA300_.jpg
This is a link to the Moltres deck-box.
http://ecx.images-amazon.com/images/I/31A8L549nXL._SL500_AA300_.jpg