That should be nice rig.
Does your 1070 have pre-outs? You could always switch up and put the Front 3 on an external amp.
Replacing a working AVR right now is still a bit of a fools errand. You should hang tight,
if you can, until the 2022 machines comes out and see how they fare. They should be better than the current crop. *finger crossed
(Not to say the current crop is bad, but everything is still suffering to some extent from the past couple years.)