PS Audio PWT and PWD MK II--recent acquisiton

I began a discussion of HDMI cables for I2S under the Cables heading, but my observations and questions about the PWT and PWD MK II are more appropriate here, I think. Having had some time to put this combination through its paces in my system (Modwright KWI-200 integrated, Proac Response D-2 speakers, Rel S-2 sub, Analysis Plus Big Silver Oval speaker cables, Clarus Aqua XLRs, Pangea HDMI) I'm not very happy with what I'm hearing. Yes, the two digital sources (DAC & transport) produce impressive resolution, spatial sense, and detail, but in a way that strikes me as very unmusical. In fact, though there's no discernible "glare" in the sound, it is extremely piercing and seems like it could damage my hearing if I listen too long at even reasonable volumes. 

My Cambridge Audio CXU universal player is much more pleasant to listen to even if it doesn't quite match the hyper-resolution of the PWT. I have a Wyred4Sound reclocker inserted between the CA player and the DAC, connected with Audioquest Carbon coax cables. This produces a much more musical presentation.

I'm open to suggestion here, though. Anybody experienced this, and can you suggest a remedy? My first inclination is just to sell off the PWT as a failed experiment.