Another receiver in the 1500 ball park range is the NAD757. Highly regarded 7.2 with ATMOS outputs {Enabled}, also has DIRAC.
More comparable to the Anthem MRX720. As opposed to the MRX520 with 5.2.
Plus A.R.C. and Dirac are supposed to be the best room corrections at the moment.
Definitely more real power than an Onkyo or Yammie. I was an Onkyo guy for years, the last year I've gone Anthem and couldn't be happier.