One afternoon at DeJaVu Audio, I listened to a pair of Audio Note speakers, I think their model E, if that makes sense, being driven first by an AN Kegon amplifier (for sale then at ~$125K) and then by the AN Ongaku (probably around $80K). This was at least 20 years ago, so maybe prices are higher now if those amplifiers are still in production. Anyway, they both sounded very good, but there was a distinct difference between them having to do with tonal balance. I cannot recall exactly how they differed in their presentation of music on a speaker presumably designed to accommodate both, but my thought was if there is such a thing as "perfection", ought these two amplifiers to be nearly identical in sound quality? Anyway, if expensive parts per se are the way to Nirvana, surely AN products ought to be on the way.