I had the opportunity with a fully modded Bolder EE Dac to demo the Psvane against the stock tube and a 1950's Mullard and the Psvane was remarkably crystal clean,,, very nice. But it was at the expense of the 3D soundstage that I came to love with the EE Dac. In this, the Mullard really excelled and in the end was just more musical in the Salk HT-3 system I did this demo with. I can see why Wayne of Bolder likes the Psvane so much but I can also see why others don't care for sterile stereo regardlesss of it's clarity. System synergy & personal preference is everything.
Cheers,
Robin