I have a 509Z paired with these: Fritz Carrera BE Specifications (fritzspeakers.com)
Call Fritz and ask his recommendation. I gave up my Harbeth SHL5s for these and am not looking back. I also use an Aurender A20 for streaming/DAC. My analogue system is a Thorens TD-1601 with an Ortofon Cadenza Blue which is nearly a perfect match for the phono stage in the 509Z.