I love the front, but you should re-think the back. The black and white theme of the front shouldn't be just the front, you should turn down the saturation of the back. Don't turn it all the way down, but just enough so that it looks good.
Mind shrinking it? It's difficult to critique when it's so large.
Anyway, from what I can see, I like it. The front is more emotional and unique compared to other Halo boxes, but the back seems a little generic IMO.