thanks Tikker. I've been on ASUS website and looked at the UI and it seems easy to use.
The RT-N56U is less expensive than the Airport Extreme and seems to have all the features (ie 4 wired ports, printer port) that I need.
Since I'll have the radio off for periods of the day, I'll have to use one of my wired Windows servers to go in and turn it back on outside of the timer schedule.
I didn't see Mac OS as an option on their download site so I'm going to assume I can't use my wired iMac to access the UI.