OpenWRT is standard for routers, you can even run it on x86 just fine, and unlike PFSense it won't shit a brick and sit in a broken state at console just because a secondary ethernet interface disappears.

PFSense really is targeted at the prosumer market. If your happy to haul a screen out on every upgrade or minor hardware change, PFSense is fine. Otherwise, going Openwrt is a solid choice as you can actually debug it remotely.