My bad. I lose track of the fact that my $500 Onkyo TX-SR707 with pre-outs — that I just gave away for free — was bought in 2009. Even still, that’s still less than $700 adjusted for the mininal inflation we’ve had the past decade. It seems weird to me that in 2022 you can no longer buy an AVR...
I've missed some details in the usage description...why not get a $600 AVR with pre-outs and that's that? You've got a 5-ch amp and only need 5.2 surround. The Denon 760H will do that for $600; $500 refurb if you can find it.