Right now, the PS Audio PWT/PWD does have a very relaxing and involving sound (it is fun!), and it continues to improve. However, the Levinson Reference combo seems to have a way of resolving the details better. I here more tones and shading to instruments. So far, (and I don't want to say, it can never have these attributes, as I am still trying new power cords, interconnects, etc) the Levinson sounds more delicate, has better timber and nuances, a leaner but true to the music bass.
I would attribute these differnces to the expense and over engineered Levinson power supplies, a superior transport system, and DACS that are still highly regarded today, even though they are not as fancy or modern as today's era. I guess I would call it execution on the Levinson side.
The reference products were and are something special.
I propose that if a company used the Levinson standard for engineering along with the ideas invented and pioneered by PS Audio, something special indeed might happen in the audio world. However PS Audio wanted a product that many people could afford and the Levinson combo retailed for over $20000. I believe.(which was out of my reach if I hadn't purchased it used). I am using the I2S connection via a Nordost HDMI cable suppled by Music Direct.
I am a fan of the PS Audio combo. I do like it . . .a lot.
Is it a contender for best in the world . . . not sure, still experimenting and evaluating.
Thanks for the compliments on my system, and wait to you see the Helix, I'll be posting new pictures soon!