Home Theater Processor

I have to say, I really like the NAD modular system a great deal.

I don’t think the M17 does Atmos. 

Of the two the OP selected, the MX160 has roomperfect, which is the best option for room correction. 

But I would recommend waiting. Next gen pre/pros with hdmi 2.0b or even 2.1 are almost here, and 4k with dynamic HDR should be good enough for most people for the next 10 years, like 1080p has been. 

i don't know too much about proccessors, but the mcintosh mx160 is their latest unit. it doe's cost a lot. i would look into this more before you buy.