Replacing Elan Z660 6 Channel Amplifier

[ATH]

I have multiple Elan Z660 6 channel amplifiers installed in my home that were there when I bought it. They are no longer functional and was looking to replace them so that I can use my in ceiling speakers again. Current setup is x4 Z660 6 channel amplifiers with a Elan HD series controller for 6 zones of audio. Do you have any suggestions for what I could replace this with?

 

[daytona600]

Marantz , Denon Heos multiroom systems offer 5/7/9/13 channels