Pioneer VSX-1022-K: This is a discontinued product by the manufacturer. It has 7 channels and 560W of power output. The receiver is network ready, which means it can be connected to the internet for streaming music from Pandora or your iPod/iPhone. However, this receiver does not have any advanced features such as 4K Ultra HD Audio and Video or Dolby Atmos Height Virtualization. It also lacks compatibility with HEOS Link for Wireless Music Streaming. Overall, while it may be a good option for someone looking for a basic AV receiver, it is outdated compared to other options on the market. Denon AVR-S540BT Receiver: This receiver has 7 channels and 120W of power output per channel. It supports 4K Ultra HD Audio and Video and can be used as a home theater system. The receiver also has built-in Bluetooth and USB port, which allows for easy connectivity to other devices. Additionally, it is compatible with HEOS Link for Wireless Music Streaming, making it easy to stream music from your smartphone or tablet. However, this receiver does not have any advanced features such as Dolby Atmos Height Virtualization or AirPlay 2. Denon AVR-X1600H Receiver: This receiver has 7 channels and 80W of power output per channel. It supports 4K Ultra HD Audio and Video, including Dolby Surround Sound and Music Streaming with Alexa + HEOS. The receiver also has 6 HDMI inputs and one output with eARC support, making it easy to connect multiple devices such as TVs and gaming consoles. Additionally, the receiver supports AirPlay 2 for streaming music from your smartphone or tablet. However, this receiver does not have any advanced features such as Dolby Atmos Height Virtualization. Pioneer VSX-934: This receiver has 7 channels and 105W of power output per channel. It is network ready and supports music streaming with Alexa + HEOS. The receiver also has Audyssey MultEQ Advanced Calibration, which allows for advanced sound calibration for your home theater system. However, this receiver does not have any advanced features such as 4K Ultra HD Audio and Video or Dolby Atmos Height Virtualization. Denon AVR-X4500H Receiver: This receiver has 8 channels and 125W of power output per channel. It supports 4K Ultra HD Audio and Video, including Dolby Surround Sound and Music Streaming with Alexa + HEOS. The receiver also has 3 HDMI inputs and one output with eARC support, making it easy to connect multiple devices such as TVs and gaming consoles. Additionally, the receiver supports AirPlay 2 for streaming music from your smartphone or tablet. However, this receiver does not have any advanced features such as Dolby Atmos Height Virtualization. Overall, when choosing an AV receiver, it is important to consider what features are most important to you. If you prioritize sound quality and calibration, then the Denon AVR-X4500H Receiver may be a good option for you. However, if you prioritize streaming capabilities and compatibility with HEOS Link, then the Denon AVR-S540BT Receiver or Denon AVR-X1600H Receiver may be better options for you.