Back on topic with my two cents: I have a Yakima roofrack with the Viper fork mount. Since I have a wagon with factory rails, it was the natural choice. The bikes sit rock solid, although there's some noise above 75mph. In the winter I take the trays off and lash my snowboard to the rails with bungees.
The only con is a slight drop in fuel economy on a long drive and the potentially catastrophic drive into the garage with the bikes on top.