Im literally trying to make the same decision as you...
I dont really like the two tone space gray with satin black as in your first picture. Im leaning more towards having the whole thing matte black, or a combination of the two just like in your second picture. Planned on plastidipping the whole thing matte black to see how'd id like it.
People have also wrapped diffusers in CF which seemed to hold pretty well. Id like to see what people have done with there IS diffusers, hopefully we'll see more pics.