If you were to sell both headphones, the Stax SR-007 would be the best for you I am guessing, but it requires a totally different amp. You can get a KGSSHV from mjolnir-audio.com for the price of the amps you listed though.
If you don't want to go the electrostatic route then things become more complicated based on your apparent preferences. The only options I can think of here are a used HiFiMan HE1000 (unless you are willing to drop $3k on a V2) or maybe the Focal Clear but I have zero experience with it.
If staying away from electrostatic systems, then I would get the Mjolnir Audio Pure BiPolar amp (or wait for the upcoming HeadAmp GS-1 Mk2 if you are patient). I would expect it to best the ones you listed in transparency, fullness, separation, and perhaps extension, as both its amp circuit and its power supply are proven to be some of the best measuring, best performing ones out there, and only excellent quality components are used throughout (plus it is a fully discrete amp unlike Violectric).