Apart from the 2 speakers, I will need an AVR/ Amplifier. ... avr-x1600h It looks like the Denon AVR has a multitude of outlets at the back. It also has a bigger form factor.

The Denon 145-watt-per-channel AVR-X1600H (£449) and 150-watt-per-channel AVR-X2600H (£599) - which replace the AVR-X1500H and five-star AVR-X2500H introduced in 2018 - support 7.2-channel surround ...