Best 7.1 Receiver What Is The Best 7.1 Channel Stereo Receiver I Can Purchase Around $500?

What is the best 7.1 channel stereo receiver I can purchase around $500? - best 7.1 receiver

With a view to upgrade my 7.1-channel receiver. I wonder what would have to buy the best receiver to the stadium would be $ 500. So far I have tried to Denon, Onkyo, and Harmon carding. I appreciate any suggestions.