If you can't afford that one, I've had excellent results with the Buffalo WHR-HP-G54. I have several of them, useful for doing mesh networking so I don't have to go laying cables all over rented houses.
You can just about run OpenVPN on it as well.
It also has an internal serial port, and people have managed to power it on batteries and suchlike fun things.
You can just about run OpenVPN on it as well.
It also has an internal serial port, and people have managed to power it on batteries and suchlike fun things.