First read about these in Katz's Corner review of PM-3/HA-2 combo after having bought pair of used LCD-Xs for listening at home. Had thought about smaller step into HE400i phones, but decided to jump further into the planar world. I keep reminding myself that life is short, I can always trade, and waiting just gives my hearing more time to decline. (I may come up with an acronym for those factors- LISCAT is a start but I need something for the hearing decline, maybe a LISCAT equation.) Have been delighted with LCD-Xs and have started looking for a used portable system with HA-2 or Chord Mojo and Shure se846's or Noble 6s, but the compactness of the PM-3s makes me wonder. I would be staying in the planar world and their portability isn't nearly the same, but still . . . I wouldn't be exercising with either of them.