I've only been using it for a couple months, but OPNsense (FreeBSD based) is such a solid piece of software. I installed it on a cheap Beelink mini PC with dual 2.5 gb NICs and an N150 processor (model EQ14), and it's been reliable and a pleasure to use as my router. I have a TP-Link Omada setup which I've been pleased with, but I feel no need to purchase one of their gateways.
What do you use for OpenBSD hardware? Is it power hungry? Is it performant?
I had a great stint with OpenBSD on an older Pentium 4 Dell tower a few years back. For basic firewall rules, I had line-rate performance on my NICs. But for a home network I'd love to have something more energy efficient.
I posted this in a sibling comment, but I can confirm Beelink's EQ14 [1] works well with OPNsense (FreeBSD based instead of OpenBSD). The dual NIC model uses the Intel KTI226-V chipset which has rock solid FreeBSD drivers.
Search Amazon for "pfsense mini pc". (smile as you think about how this triggers that one pfsense guy!) Intel N100 or N150 processor, passive cooling, typically 5 1000GBASE-T or better ports, RAM and SSD included. Should be able to get one for ~$200.
My current router at home is a dell vostro 3020 with a quad port intel nic. I usually get dell for the firmware updates they provide well after warranty.