Dan, I like the medieval/European textures in the first moodboard. See if you cant pick up at least some of that texture and color in your final design.
you did a great job with your diagram! i was not that patient :)
I think you are headed in a good direction. Since they are a more established band I think staying true to a classic rock feel, using black to contrast their photos and their logo will look great. Also stick with your texture thought I think you'll end up with an awesome end result.
Have you thought about incorporating the teal color from the banner? I think that would look great with the black.