Sophia Electric Blue glass

 Good to know.

So the Psvane 6SN7 globes have burned in and are excellent sounding. The bright tonal balance has faded leaving a very transparent and detailed tube.

Still somewhat scant feedback.....

I was blown away by the 2 quads of blue glass KT-88's that I installed in my VAC Phi 300 that I wanted the full complement.  Galen Carol audio's website gathers first-hand experiences of the 6SN7's, and the qualities described there are what I'm hearing in the KT-88's.
There's an unmeasurable magic that caused my eyes to well up last night - yeah, the real rare magic of music.  In  Anne Sophie Von Otter's  'Sovente il sole' (Vivaldi) there's a moment when her voice emanates from the same note at the same moment the violin plays it. Purest beauty. 

I just rolled in a 274B rectifier and paired 6SN7s into my amp and wow are they good:

https://systems.audiogon.com/systems/7635