Luxman 509x or Simaudio 600iV2 with mágico A3.

Yes I meant Hegel 590.

I tried with several speakers and was dull power no finesse vs Luxman and moon.

I run 509x with S3MK1, same 88db/4 ohm rating.  At times I wonder what more current would sound like and at times I laugh out loud to myself just how good it sounds.  

FWIW the demo of 509x and A3 was all the talk of the FL audio show a few years back.  
Also FWIW used 509x is plentiful right now right around $6K, a bargain for sure.  
Enjoy! 

If people only knew how good A3 with 509x.

I have had several sound systems twice three times the price.

I just love this.

I haven't heard Luxman and Moon with Magico - though I have listened to them through Wilson.

I've been impressed with both.  My perception is Luxman has slight warmth compared to Moon.  

If I was you, I'd try to get an in home trial because I think the differences are preferences not quality and reliability.

Both amps are excellent.

You are right the 509x fil the drivers with a wider stage.

Moon still musical and warm but with a more dead background and more information.

Both amps work great now it is a matter of personal preference that I need a few hours of audition.