You will very likely want to have the new HDMI 2.1 inputs and outputs on you’re new AVR, they have an extremely fast transfer rate of 48 GBs, make sure you get certified 2.1 HDMI cables, too. I just bought a new Onkyo TX NR6100 AVR on sale for $200.00 off at 699.00, including 2 day shipping for free. It pairs nicely with our new Samsung NEO LED TV, which also has the new HDMI 2.1 standard, both are backward compatible with previous HDMI versions. I used Onkyo’s version of sound/room management and it worked and sounded great. Not sure if it has the ability to use a different amp, though. Hope this helps!
Bob