If you seem to be happy with the detail on your image then that's good enough, you have to remember that not all screens are created equal. Another good test, your print out looks like your screen. That said, if dark was what you wanted then it's good, from my own view I would like it just a little lighter to see more of the ridge. I am playing with HDR clouds right now and find that keeping the blue out on color shots when you want a dark blackish cloud is very tricky. Mono is one way to make that effect. Nice picture and keep up the good work.