You know my vote.Opening would save you more space too, cos that box be huuuuuuuuge. If you wanna keep the box and space is an issue, you could fold the box up and chuck out the tray. Or if you really don't wanna do that, have the box encased in really strong perspex or glass and use it as a small coffee table.
Remember that preordering gets you an earlybird discount.(Amazon Japan is still taking orders with a really generous preorder discount; you'll need to use a Japanese residential address to order through them)