Best speakers with Pass labs X-350.5

Merlins,along with the others mentioned above,good luck,Bob

My system are wadia 861, Pre amp Aesthetix Callisto Sig., a pair of Pass XA-160 and the Alto Utopia BE. It sounded wonderful so check out the Alto. Good luck

try wilson audio sophia 2

I think you'd enjoy the Wilson WP7 in your system.
With the ARC Ref2 and X350.5 I would not worry about hot treble with the Wilsons.
Dynaudio should be a good match as well.
I don't know what you meant by whisper treble on the 802Ds though. I think the X350.5 may be just about the starting point as far as power is concerned fot the 802D so if you don't listen to heavy metal at ear bleading levels, then it may do.

I found the Audio Physic speakers to be a great match with Pass Labs amplification. I had the X-1 pre with the X-350 and the XA-160s matched at different times with A.P. Virgo IIs and finally the A.P. Avanti IIIs. I chose the XA/Avanti III combo over the XA/W.P 7s.... to my ears a more natural presentation.