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.
