I've seen most other clear cases, which are nothing more than six pieces of flat, boring, geeky-looking clear plastic panels screwed or glued together. I'm using a
ColorCases.com 200 series Millennium case, which is transparent and actually have a very slick and slightly contour design. It is a blue-and-white transparent case with a cool design. The entire case is transparent, very light-weight, and felt very solid (it's made of some high-quality hard plastic.) The case is also very accessible (the entire case is screwless and the motherboard base is removable) and quite spacious. Right now through my computer case I can see the motherboard, drives, wires and cables, power supply, fans and coolers, green lights, and all the cool stuff inside. I am very happy with the case.
Unfortunately, only
ColorCases.com has it for $99 (around $120 with S/H.)
ColorCases.com has good customer service but the worse and slowest shipping.
Also, the plastic case doesn't have any metal plate to provide shielding from all the radiowave frequencies or whatever. What does that mean for the system and the user? I have no idea.