Parasound Halo, McIntosh, Pass, Wyred......
Man, I have to say that some of these suggestions, and others, absolutely baffle me.
Could you explain two of your suggestions: I've had a bit of experience with Parasound Halo and W4S amps and neither even remotely have ever struck me as having even a wisp of tube characteristics. For that matter the suggestion of Bel Canto Class D also baffles me - those amps occur to me as linear, cool and neutral as any I've heard, especially the Parasound. I owned Ref 1000's for a few months, and have tried them with a few different permutations of associated gear as well as have heard them in my friend's system and at shows. What exactly about these amps reminds you of a tube amp?