what are the best sounding Accuphase or Luxman amps/preamps?

Most Expensive, Nonsense,

Are you only considering Solid State, or Tube Models?

Tubes, the better question is, what tubes sound great 'to you' because it's not better, rather 'preferred'.

My Luxman 10 wpc tube amp is terrific for efficient speakers in a small space. It would be nearly criminal to put a more powerful/more expensive/most expensive amp in here. 

The object was to be able to use tubes in my office, low power to minimize heat, size, increase placement options, and lower cost compared to more powerful category. Achieved!

here it is now

Never heard an Accuphase except in a showroom.

I prefer SS - class A.  I am considering the Accuphase A-48 amp which is rated at 45W at 8 ohms, 90 at 4 ohms, 180 at 2 ohms and 360W at 1 ohm.  It has a high damping factor of 800.  It is their smallest current production separate amp, but it is not small!

My speakers are efficient at 93dB and they have a minimum impedance of 3 ohms, so the A-48 should be a good match.

I would take C-2450 + A48 over any Luxman offerings. I own E-650 due to space restrictions, otherwise I would switch to Accuphase separates in a heartbeat. 

Accuphase is a small company from Japan 

And match pairs every part . My uncle is a Electronics engineer 

For over 40 years and has been to luxman as well 

Both are quality products  ,Accuphase is just a level higher 

But also more $$. I have owned both 

Actually listened in depth to the latest line 

Very beautiful with bigger meters for sure too 

Better quality build,parts quality then Mcintosh also.

All accuphase are great, even so called (Laugh) entry level. If entry level is 7k to u....they don’t f around. If someone was to give u the e280 for free, I don't think anyone would say no.