I am using at office for a few days the WM1A + with MrWalkman Z++ 2.0 connected to a spare Speaker Amp TA-N55ES ... and results are just impressive with an Heddphone, a Z7M2 or Ultrasone Ed15 Veritas.
But a bit monstrous on my office desk
So Even if I never had a chance to use it, I would love to go to a DMP-Z1, but almost impossible to get it Europe now ....
Actually, I am thinking, to go to an intermediate way with a Sony TA-ZH1ES => but not sure the DAC of the TA-ZH1ES connected to the WM1A and the only 2x1.2W available will be as impressive as Z++ 2.0 + TA-N55ES..
I feel pity I can't get an analog output of the Sony's dock station with WM1A .. as I only get an output for an external DAC and nothing else.