My headlamp is the Petzel Mayo5 at 6.8 oz and my camera is the cannon A610 at 10.3 oz. I got the headlamp b/c is takes AA's like my camera and I can switch them back and forth. I don't think I need that anymore. My camera gets great battery life.
Money wise I am tied to the camera, but I think I am going to upgrade the headlamp.