There are many computer cases out there, but my favourites are:
Antec P180, P182
Lian li anniversary edition snail like case
Asus Vento 3600
Asus Vento 7700
The most underrated of all but most liked by me:
The Spire pininfarina case, (a designer case)
Enjoy!
The Spray Can
Gourmet Graffiti 