Home Theater Processor

The Classe sigma SSP mk2 does atmos, but you could also look at the Marantz 8802. 

The Mcintosh MX122 is also an option. It’s the baby brother of the Mx160. 

Keep an eye on the HDMI version of the units you buy.  Without at least 2.0a, you can’t get HDR, which is probably more important than 4k at this point. 

Marantz 8802A or the NAD M17 V2. 
If you're looking at the 10k'ish range I would go with something modular for future upgradeability like the Theta Casablanca. 

Sorry, I could care less about Atmos. :)

Best,

E

I have the avm60.  It performs great, but the sound quality is relative depending on what you're used to.  Don't get me wrong, the SQ is very good.  But in the context of the rest of my system, which has fairly high resolution, it brings a slightly warm sound and I believe holds back the system on resolution when watching movies.  If I were to do it over again, I would go with the Krell Foundation.