So you are looking to build your own tiny computer? The Z-Case P50 PC case is worth a look. It has an anodized aluminum and tempered glass construction and can hold a mini-ITX motherboard, a full length graphics card, and 4 x 2.5″ drives.
The case can be used in tower and console modes. You can also mount it to the wall. The case is compact enough to fit in 15″ backpacks.