"we all hear differently." I couldn't agree more!
When moving up the c-j line of pres often times the output impedance moves up too. Making system matching more of a concern, especially with many ss amps, even more so with amps like the Pass Labs with some having rather low input impedances. And, of course no c-j product has balanced connections, which the Pass Labs seem to work best with. While I can certainly appreciate the charms of tubes, I'm not convinced they are the panacea some might suggest they are. But then again, "we all hear differently."