I`m using Chapter Couplet M500 for the center and the Couplet 300 for fronts and 2 pair of couplet 200 for the rears with my 861V4

PerS

40th.Anv.DSP8000SE &861v8/ID41,Meridian Ultra Dac,C15 Black w/SSD,QNAP TS-669Pro 6X3 Tb w/Core,HD621,Oppo UDP-203 ,JVC DLA-X700R, 2xJL Audio F112v2, Marantz 8802A for Atmos with KEF Reference 5 and 4C withR700 sides & rears and 4xKEF R50 Atmos