No contest, Conrad Johnson is as good as it gets in tubes. They keep the pathways simple, and utilize the highest quality materials. That's their ethos. Their reference amps ART300 are the best high powered tube amps in the world, so I assume that would trickle down to their integrateds. I used the CJ LP260M with the Focal Sopra 2's and had tremendous results.
And, it is American Made.
And, it is American Made.