I like the BMPW design. I just wish it was a bit less pricey. At $150 each, I'd need to spend $1200 just to hold a single pack of every deck in my collection! Right now, as imperfect as it is, my second-hand shelving unit's looking good and holds the whole thousand-plus collection with some room to spare. Display boxes like the ones in Curt's avatar can be made pretty cheaply.
I'm rambling. Much as I'd love to blow a wad of cash on displays, my fiancee would leave me. She's worth more.