I wish AKG could come up with a flat headband design for q701 (without the headband bumps). because lack of comfort might be a deal breker for some people.. both 701,612 are great options but I didn't find q701 as the more refined one. to me both have same refinement.
There have been MANY suggested fixes for this in the Q701 thread. The one both Evs and I use cost about $9 on Amazon (tho I already had one because I used it for what it was for: a baby carseat strap pad). Also keep in mind that many people don't have issues with the comfort.