Another vote for the Siemens Speedstream 4200 here. I've been using it for a small home network for two years now. It's one of those set it up and forget about it types. Really reliable.
It fronts for our network at home, but I've disabled almost all of its built-in features, preferring to let the OpenBSD machine behind it do all the work (packet filtering, NAT, DHCP, DNS, NTP, proxy, wireless AP, bandwidth-shaping, spam delaying, etc).
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