Anthem AVM 60 vs Classe SSP 800

I didn’t realize Sigma SSP didn’t have multi channel input. I’m also a big fan of m/ch SACD so Classe processor is off my list. Will look for Marantz 8805 or 8802a. 

@dmk_hifi  

The Marantz AV8805 or 8802 are great choices when used for surround sound movies (home theater) but would not sound as good or as musical sounding as the Classe SSP 800 or Sigma SSP for music (both stereo & mc music). 
I suggest you look for a used Classe SSP 800 as it has multi-channel analog audio inputs (7.1) as well as stereo (XLR & RCA). The Sigma SSP has only stereo analog audio inputs (XLR & RCA) since the Sigma SSP is optimized for stereo and its stereo front LR channels were derived from Classe CP-800 stereo preamp/DAC. 

@dmk_hifi 

You could convert DSD to PCM in your Oppo and output multimately-channel PCM via HDMI to the Sigma SSP but I wouldn't recommend doing that as it would degrade the sound quality of your SACD. SACD (DSD) should be outputted in native DSD. So the Classe Sigma SSP isn't for you if you want to listen to multi-channel SACD. You should definitely look for a used Classe SSP 800 as it has multi-channel analog audio inputs (7.1).

Besides the SSP 800 would sound better for surrounds or multi-channel processor than the Sigma SSP. All channels on the SSP 800 are true differential or fully balanced design all the way whereas on the Sigma SSP only its front LR channels are true differential or fully balanced design and were derived from Classe's own CP 800 stereo preamp/DAC. 

While the Marantz AV8805/8802 provide XLR balanced analog outputs for all channels but they aren't true differential or fully balanced design. The Marantz uses its proprietary HDAM circuitry for its analog output stages for all channels but they aren't true differential or fully balanced design processors like the SSP 800 or the Lyngdorf MP-50.