For those not interested in a sleek computer enclosure like the SilverStone Temjin TJ10, a humongous chassis like the Cooler Master ATCS 840 EATX, or a professional-oriented chassis like the SilverStone Fortress FT01, there is the Sunbeam Acrylic UFO Cube Case. The Sunbeam Acrylic UFO Cube Case is a do-it-yourself case that is made almost entirely of acrylic and will allow you to show off all of the hardware you have installed.
Funny, my friend has a case like that. Cleaning it up sucks, and every flaw shows. Also, it's not very sturdy and it feels like it could just come apart on you.
Strangly enough though, people think that the lights and transparency makes it faster. We tried it by asking people, throwing high-end machines in dull cases and absolute trash in flashy cases. Most people would go for the flashy case.