Given the speakers are easy to drive, might the Ayre VX-5 Twenty be adequate.I’d stay with the JC1’s, and use them in hi bias mode, and try to vent the heat away somehow. John Curl is no slouch, I’d put higher up the design ladder than Charles Hansen (RIP) if it was Charley that designed the amp, if not then definitely stay with the JC1"
My reviewer friend Edgar had the JC1’s on his Wilson 8’s then his Alexia 1 and in high bias mode they I thought they were the sweetest most relaxed amps I’ve heard, yet can also be most brutish controlled amps when they needed to be, then he got the Gryphon Antillion Evo (also with different class-a settings) and sound went up another step again.
This is him here and the Alexia 2 review
https://www.soundstageaustralia.com/index.php/reviews/84-wilson-audio-specialties-alexia-series-2-loudspeakers
Cheers George