Doctor Who - Cyberman Redesign

Here's a redesign of the Cybermen - knocked up fairly quickly, so it's not perfect, and doubtless I'll mess around with it more in the future.
I wanted to go for a more creepy, arresting design, hence the inclusion of bone, and fragments of skin - I really wanted to express the horror of the concept of the Cybermen visually. 
Hope you enjoy, constructive criticism would be appreciated.