Guys,
I really appreciate your help on this. Another fellow e-mailed me privately and suggested the Parasound Halo JC-2, which is also a very good candidate.
Regarding the audibility of absolute polarity, I have always had phase-coherent speakers and have always heard differences in my recordings when going from absolute polarity to inverted polarity. For whatever reason, I usually hear more of a difference if there is a tube component somewhere in the signal path.