Looking for a new Linux router. Buffalo AirStation?

[Joshua Judson Rosen]

After 13 years, I think it may finally be time to replace
the PC that's been acting as the router/firewall between me,
the Internet, and people looking for Wi-Fi in my neighbourhood.

I've heard that Buffalo Technology ships DD-WRT pre-installed
on their devices, so maybe that's what I want. But I have a few
questions--so I'm hoping someone here can help answer them
(*someone* here must have one of these things, right?):

    * What I have right now, and what I really want, is basically
      - 2 separate wired interfaces, both of which are distinct
        from the wireless interface
      - a bunch of iptables rules to route/firewall between
        those 3 different networks

      Will one of these Buffalo let me have that?

    * Checking the listings on Amazon.com, I see a bunch
      of different AirStation models with different prices
      and different numbers in their names, but I can't tell
      what the actual differences are other than their names
      and prices. Help! What's the different? Which one
      do I want, if any?

    * Do they work well?

-- 
"Don't be afraid to ask (λf.((λx.xx) (λr.f(rr))))."