i am done. good hint with the guitar dealer, as the one in my city offers the whole shure line up. so i gave both the 840s and the 940s a breif listen and for sure the 840 is a very good headphone for the price. with lots of details a well rounded soundstage for a closed can, but the 940 is much more airy and analytical just the way i like my k701. ok, the highs really are more edgy, i would call it "sharp". not as smooth as the akgs, but its no big deal. bass is dry and deep reaching. instrument separation is outstanding for a closed back.
only downside, that they cost as much as the akg but are not quite on the same level of both sound- and buildquality. if you throw the pricetags in the jar, the 840 is by far the better buy. well, sometimes i am not that rational and thats why the 940s are getting their burnin right now, right out of my amp.