[patrickmn]

http://www.pcengines.ch/

Have had several apu1d4 OpenBSD routers running 300mbps+ connections for years with no issues.

[c17r]

I'll second pcengines. Just built a apu3a4 with openbsd as the firewall/nat for my gigabit connection and it was a fun little experience.

It was ridiculous how easy how few lines it took to get openbsd configured.