New high end processor

Hi all, I am in the market for a processor to power My PMC speakers. I currently have a 5.1 system but in the near future it will be expanded to a 7.1 or 7.2 possibly with atmos. I have parasound halo amps. I have been in a holding pattern with a Denon 3400 with which I am not enamored and have yet ot hook up my amps. So, my budget is 5k. I have seen the Marantz 8500, Avm 60 and the Yamaha Cx 5200 on line. I am sure that there are others, and updates for this year? Suggestions?

Thank you