Luxman vs Accuphase for Harbeth 40.3 XD

Well, I can't give you a direct answer, but I can tell you that my Luxman L-505uXii mates very well with my Harbeth 30.1 speakers. There is a warmish character to the amp (in my room, with my ears) and the sound is balanced. I get more bottom end out of my speakers with the Luxman, and ended up selling my JL Audio subwoofer because I preferred the sound with out the complexity of the sub. Is there any way that you can audition either or both of the amps with your system? 

I purposely stayed away from class A amps although I knew there would be trade offs. I would not think that the Accuphase was 2X better than the Luxman. Of course this ignores the fact of diminishing returns in this hobby. Good luck on your hunt. I would not get in too much of a hurry. You did not say what you were replacing to drive the Harbeths. 

You know, at the end of the days, it is going to come down to listening with you ears, in your room, with your system and your preferences. You will literally get hundreds of various recommendations. They are all well intentioned (well, maybe except the guy referring to the goofyass Harbeths), but their tastes , room and system are not yours. Good luck on the search. A while back, while searching for an integrated for my 30.1 speakers, I spoke with a Pass dealer (maybe Reno Audio?). Their recommendation was to go with higher powered A/AB amps as opposed to lower powered class A amps