I like all of the individual elements of your design, but I feel that they do not all flow together. I like the logo, the background, the simple navigation, and even the sidebar header part looks nice enough...
My personal opinion is that all these elements look like they belong to other templates, visually anyhow...
My feedback, would be to break away from the container box and ditch the border... Open the website up and show off that dark and sketchy background image more... I think a font like Impact with some weathered type of overtones might create a dismal type of mood for your headers and toolbar navigation, using images and such...
Also, the black and orange color combination, I feel, has been used and abused... There are at least 16 million other colors to choose from, and I say explore the palette and see what fits your mood from one day to the next...
Good luck and good start!