Not having to deal with split horizon dns or nat hairpinning is pretty nice, especially with so many things using DoH with public resolvers nowadays, like android or firefox.
I just put A and AAAA in public dns so things work either ipv4 or ipv6 on the outside. On the inside everything works on and prefers ipv6 so it just works on the inside too. Nothing ever even attempts to use the wrong (public) A record on the inside.
I’ve had good luck with goharddrive.com. They sell through amazon as well, but I believe they ship direct. I usually get the hgst, or now wd, ultrastar hard drives. I’ve had zero issues.