I generally don't have any issues with Denon AVR's. I've replaced one in the last year due to lighting strike. I've only sold 3 of the Marantz receivers in the last 6 months and had one issue out of the three. It had an issue processing 4k, called Marantz and they told me to use the closest HDMI inputs to the output port for 4k content. I switched the input and it did improve but was still a downgrade from the client's Integra. Marantz always sounded better to me then Denon but they never seem to get the video right.