http://www.next-gen.biz/index.php?option=com_content&task=view&id=1550&Itemid=2 They all have the same basic structure but different design on the front..
come on i wouldn't mind having one as a pc case i like the looks but some are uggg. THe one thing that stands our is that they knew they wanted the contour shpa of the console.
I myself quite dislike number two and number four, though I can see how the second one is more similar to the original Xbox designwise. They are definitely far inferior to the final version. Very interesting link
the all silver one looks like it be part of a kitchen with stainless steal appliances, can you imagine the xbox 360 able to hook up to your microwave to load up preset times for food, ah the possibilities.
Some of these designs were showcased in the Official Xbox Magazine's 360 Launch special issue that came out last month.