I went over the competition
in this post. If you must have 16 channels + Dirac in one box, then the Monoprice is the cheapest way to get that. But as I said in that other post, 16 channels in HT has questionable value due to the state of Atmos content, and if you're looking for the lowest price per channel with good room EQ and all the decoding you need, the Denons are a better value.
If you're trying for a genuinely high end setup, you should wait for a JBL SDP-55/SDR-35 review. I'm saying this from the perspective of someone who actually wants to buy one of these things because I eventually want a 7.2.4 Atmos setup with Auro3D upmixing capability. But I'm in no particular rush to buy a product at the $4-6K price point, if I'm buying one, it better check all the boxes.