Now, for a few criticisms. The LCD3 sit the drivers further back from your ears, so they have an easier time in some situations of moving the soundstage back and expand it a little over the Oppos, which come close despite their compact size. The LCD3 are a bit more transparent, while PM1 are more forward and aggressive like my K812, producing snappy textures and deep pounding bass. I think the two cans are equally realistic but a bit different in presentation, LCD3 move things back a few rows while PM1 is more intimate. PM1 are more in your face, but easily wrap the soundfield around your head in all directions.
PM-1 should be a pretty straightforward choice for many. They don't weigh much, they are very easily driven, they fold flat in a compact case which is something that few flagships can do, they fold up smaller than Edition 8's just about. The accessories are more than generous. Even the box that holds the wood box is like microsuede lined, made of heavy stock, it's pretty amazing how much work went into these. Their price is lower than LCD2, but HE560 should be compared with these to figure out which is the best mid tier mid price ortho.