Agree with jjss49, Luxman is not warm, especially class AB. Quite neutral, smooth, a bit sweet, but not warm. I would say McIntosh (w/autoformers), Pass, maybe Hegel H390/590 and Accuphase. Haven't heard Ayre and new Krell, but those are often described as on the warm side.
Boulder 866 is a stunner but way over budget unless a used analog version can be found at a great price.