I have listened to AN Kit Interstage Monos in SET configuration. The guy who built them used all Black Gate caps and the higest level interstage and output AN transformers in copper. They were fed by an AN Kits M3 Pre, AN Kits 2.1b Dac with silver AN coupling caps, ans AN Kits Phono Stage. All the gear was what could be called an extreme build with mucho Black Gates, 2w Tants, etc. His speakers are Carefre Little Big Horns with Lowther DX4 Drivers.
I had the pleasure listening to his system, as he built and ran it in over a three year period. The last and final pieces were the amps. The amps are what really made the system, the best and most powerful 8 watts that I have ever heard!
Don't hesitate build these amps!
FWIW, myself and other grown men have found it difficult to enjoy our own systems after a listen.