I personally just buy MikroTik routers. Yeah, they’re not FOSS AFAIK, but they work really well and there are a ton of guides and whatnot. They also have a good assortment of hardware, so finding the right fit for my network is pretty easy.

If I ever decided to go away from MikroTik, I’d probably DIY my own router instead of going w/ something like OpenWRT. I did my time w/ DD-WRT, Tomato, and OpenWRT, and honestly, I prefer my MikroTik router.