Well, I'm lucky to have all three headphones here (SR-007Mk1, SR-009, HD800) and I love all three. In terms of details, I'd easily rank them SR-009 >> HD800 > SR-007Mk1. In terms of soundstaging: HD800>SR-009>SR-007Mk1. But in terms of my overall preferences when all things are said and done, I'd rank them: SR-009 > SR-007Mk1 > HD800s. With the LCD-X's, the HD800s are easily my favourite dynamic headphones and truly end game headphones.