I could not agree more.
I have a multi amp system through a Rane brown face active c/o with linkwietz Riley slope, a total of 6 amps, all tubes, Mc Intosh MC 40' Dynaco st 70, Dynaco M40, Shannon Parks design Go Set Go, directly heated triode
I have rebuilt all of them, both Dynacos now have a Mullard Pentode long tail phase splitter front end designed by Dr Lloyd Peppard, point to point. ( no pcb) the EL 84 tubes are wired into triode. The Go Set Go is a wonderful directly heated SET , when I built it I upgraded the caps,to Russian teflon I am not sure that I like them.In the Dynaco' I used Mundorf film, and sprague atoms the Mcs I left stock, I did not even change them to a star ground.
I have listened to each through headphones and I can honestly say that the SEX 2.1 is the most magical sounding of the group. Of course this is a two edge sword as I am going to use it for my Audeze lcd 2.1 and Fostek folded horns serving the front channel surround of the Home Theater.
I have been contemplating listening to my vinyl playback through it but I am afraid that it will never make it back to the Home Theater and then what would I do with all of those speakers and amps in the critical listening room.