I'm honestly not all that crazy about the Das's æsthetics. That part on the upper right makes me think of a manila folder (or any number of PC icons derived from such a folder). For a keyboard put forth as being elegant, sleek, &c., it just doesn't really do much for me. I'm all for its popularizing blank keys and even mechanical keyboards themselves to some extent (first mech. keyboard I heard of, at least), but I dunno. I think the Ducky is nicer-looking, personally. I would go with that.
(The volume wheel totally could be nice though).