Just setup Asus RT-N16 using the latest TomatoUSB version.
Tomato does not allow using WPA2 for a wireless bridge. They recommend using WPA.
However TomatoUSB does not allow you to use WPA on an 802.11n access point, notifying you to switch to WPA2.
Is it not possible to setup security on a 802.11n to 802.11n bridge?