Luxman vs Accuphase for Harbeth 40.3 XD

@marco1 I tend to agree; if I'm going to make an end-game change to maximize the potential of the big Harbeth's, the INT 250 is probably the one. 

I've had the E650 and 509X.  They are pretty different.  Luxman has a sharper, crisp, and clean sound without being harsh or in your face.  Accuphase is smooth and warmer, but with a vibrant and saturated tone.  If Luxman, I would be looking at L-590AX II or L-595ASE unless you want to buy new.  No way I would pay $12k for the Accuphase, but some people just love the Accuphase sound and you could be one of them.  I bought a Japanese unit set to 100V for around $8k, and easily set it to 120V by moving a connector.

If you like Harbeth, Pass may be the ticket.  I only have experience with XA25, INT25, XA30.5, and older Aleph models, but in general Pass has the most tube-like sound to my ears, and the most palpable imaging of the 3 brands.  It gives the most "performers in the room" feeling IMO.  It could be too much of a good thing if there's a particular balance you're trying to strike, but you never know until you try.  Pass also runs the hottest, if that's a factor.

@eugene81 Thanks, very helpful. Pass just keeps coming up and heat is not a factor. 

The Simaudio Moon 700i V2 is one of the best sounding integrated amplifiers that still costs less than the most basic new automobile. A new less powerful integrated  from the North Collection 641 was recently released. 

@dayglow Interesting contender, thanks. There is a 700i V1 for sale on USA for $5500 which seems like a pretty good deal.