I'd consider what level of OS support and ongoing security patches you're going to get.
I agree that the nanoPi R6S looks great on paper. Digging into it a bit this morning I see that doesn't seem to be supported by OpenWrt or Armbian. There are concerns about the security of the provided kernel. See, for example, NanoPi R6S – A Rockchip RK3588S router - #4 by maurer
If things have improved in the last few months, at US$120 and at least orderable (unclear if deliverable, a common problem with SBCs right now), it is an interesting opiton.