You could play with the "Rock" part, use guitars, rock horns?, Speakers? - You guys get better music anyhow.
Also I'd start with the NC main logo and doctor it - that way you fit into the game style better. You could make that "egale head" bit into a dead giraffe quite easily and replace the star in the middle with crossed jackhammer and guitar. I started making a mock up but my Gimp-Fu is weak and I'm going to bed instead.