If you are building up the ultimate gaming system or need a large chassis for a file server, Cooler Master has an excellent chassis that has gobs of room called the Cooler Master Stacker 830.

Not only does the chassis have lots of storage space, but it is covered with mesh panels that allow your components to get plenty of air so they run cooler and faster. This is also one of the best looking chassis on the market.
Review excerpt: "The Stacker 830 is constructed out of aluminum and measures in at a large 9.84" W x 21.10" H x 25.11" D. I think the stacker is the best looking case on the current market with the brushed natural aluminum and black mesh. Those looking for a more sinister chassis can get it in all black too. Both case colors have blue LEDs inside that make the mesh glow well in a dark room." Read the full review of the Cooler Master Stacker 830 here.