Upgrade from Classe SSP 800 processor

Hey there,
I’ve been using the Classe SSP 800 in my dedicated home theater room for a while now and while its sound quality is spectacular I think it’s time for me to explore a new current processor that can decode new surround sound formats eg Dolby Atmos, DTS-X, Auro 3D, etc.
Any suggestions?

My SSP 800 has been used strictly for surround sound (home theater) as I do have a separate dedicated stereo setup and system in a separate two-channel listening room. So that said, the new processor will also be used strictly for home theater (surrounds).

My current home theater gears are the following :
* Oppo UDP 205.
* Sony 4k OLED tv (85").
* Classe SSP 800.
* Classe Delta CAM-600 monoblock amps to power my front LR speakers.
* Classe Delta CAM-300 monoblock amp (single) to power my center speaker.
* Classe Delta CA-2300 five-channel amp to power my surrounds.
* B&W 800 D3 front speakers.
* B&W 800 HTML1 D3 center speaker.
* B&W 804 D3 & 805 D3 for surrounds.
*JL Audio Gotham subwoofer.
* 2 of Audioquest Niagara 7000 power product.

I am going to start working on remodeling my dedicated HT room in order to accommodate additional overhead speakers for Atmos setup. And when I get a new processor I will also need to get additional multi-channel amps to power additional speakers necessary.
I might get rid of my B&W 804 D3 & 805 D3 surround speakers and get the B&W 800 D3 in-wall or on-wall speakers for surrounds instead. 

Any ideas as to what new av preamp processor to get? The one that’s capable of decoding Dolby Atmos & DTS-X. But I'm keeping all the Classe Delta series power amps and will need additional multi-channel amps to power additional overhead speakers etc possibly another Classe amps. 

Thanks in advance guys.