What hardware would you recommend for AP's and dedicated Firewalls? I really value open-source so bonus points if it works without blobs or the hardware is open or has available schematics.

Altough a bit expensive I have looked at Protectli firewalls as an option as the option to run OPNsense and coreboot is attractive.

For an AP, the Banana PI BPI-R3 (R4 if I'm patient) sounds interesting being open hardware and supporting OpenWRT. I am however curious on if it would run on LibreCMC.