Good quality KT88 power tubes?

I have only tried three different sets - Sovtek, JJ Tesla and Golden Dragon Classic. Of these the JJ Tesla is best, being neutral and dynamic. The Golden Dragons are softer and lacking in dynamics, but very listenable. The Sovtek's are reasonably dynamic but have an irritating sound, akin to a ringing in the upper mids - also lacking in transparency, probably related to the ringing - microphonic?

Gold aero does not make tubes,there tubes are nothing but relabled sovteks,Tesla or china etc, that have been tested and stamped with there name.

I am now using the new Svetlana KT 88 tubes for my Melos 11 ST 90 amplifier and it sounds better than my former GE 6550A, Svetlana 6550C, Sovtek KT 88 and Tesla KT 88. Regards. Slore

To defend GA, they put significant effort in burning in and matching their tubes but they are still overpriced.