I recommend hardware/software according to the needs, budget and knowledge. For you - good platform to play with is perhaps OpenWRT on x86. It's actively developed, powerful and you have the knowledge and interest to learn more. I believe we've lost a developer to this already. For average home users the starting knowledge is a limitation - Asus routers are okay. Asuswrt-Merlin as added challenge.
I personally use pfSense because it has to be something standard. IPS/IDS is not very effective today and I don't want to run a proxy. Had some bad results experimenting with this idea. What I have is automatic IP ban, paid subscriptions for DNS/IP rules, Suricata on LAN for the obvious. Community rules are okay for home, but not for business. You can't fight your own war, basically. You have to rely on someone big who does this for a living. Even TrendMicro, they are good reputation company. AiProtection is good for home, if you agree to pay with your data. Don't forget the clients as well, perhaps the most important security part. Statistically >90% of the threats are initiated from inside the network. I use lots of Chromebooks for a reason. Desktops are identical configurations with restricted user accounts, no USB ports. Servers backup data locally and off-site. Not on a Cloud, to my own servers elsewhere. I also have my own VPN servers in 3 different countries.
Nothing IPv6 related, just some ideas. As "part of the furniture" I may get away with some off-topic.
