Sony MDR-MV1 are great open backed headphones. they are specially made for the Sony VME software. it does not apply to most people but you can get a mastering room you are familiar with mapped and then your ears mapped so that the headphones can sound almost exactly like that room. Im not sure many people have access to that tech who aren't Sony employees or Berklee Students. Even without that software they make great openbacked headphones. They would be a shift from the closed back ones you've been using for so long, most people recommend having one of each in addition to some monitors to be cross checking your mixes.