“Accuphase kit interests me, but I've never heard any of it. From what I've read/heard people say, it seems like they have an atypical class-A sound; cooler, flatter, a bit recessed by comparison“
Accuphase sounds nothing like your generalization of a component you never heard. I can only speak to E-650 Integrated that I’ve come to treasure over past 2 plus years. To my ears, it has a slightly warm (SET like) sound that is smooth yet suave with unfatiguing tonality.
The E-650 liquidity with vocals in also unmistakable. I could easily pick out the dense texture and richness of vocal harmonies on one hand and its resolution and transparency on the other. The voices blends beautifully with arrangements without congealing; the rendering of space is exemplary not just in width and depth but more importantly in the precise placement of images within the soundstage. Notably, instruments are presented as individual objects spatially and texturally, making it easy to clearly hear individual parts within the whole. That’s one quality that a meticulously designed component does well; to hear it to this degree from an integrated amplifier is quite astonishing and rewarding. Once you hear the E-650 textural beauty, resolution and liquidity, it becomes very hard to walk away :-)
Good luck with your journey!