Presently I'm using OPPO PM-3 which I have always enjoyed as my main "critical listening" cans. I also use Sennheiser buds from Massdrop Blue Box when moving about. The OPPO's are great but I'm now interested in open headphones that are lighter and cause less fatigue. After a couple of albums they cause me to feel warm and uncomfortable. I will use them for piano practice and travel but I'm looking for a full size, open back now. My budget is only $200 this time as I have enough invested in music listening so the Massdrop offerings look attractive but I'd like anyone's opinion. What do you have that holds up well to extended listening periods? As far as music, I'm all over the map, rock, acoustic, jazz etc. But not classical and not "THUMP THUMP RAP"