We came across LA based Neoporte Doors and thought they looked like a successful melding of form and function.
Santa Monica, CA
These stainless steel doors manage to be both visually appealing while maintaining an obvious element of vault-like security. Sure, they can run you up to $10,000, but they are completely customable from the glass to the lever handles.
Neoporte says that "it is a certified member of the U.S. Green Building Council and use sustainable materials and environmentally conscious manufacturing."