Best Wireless Router for Xbox 360?

I’m looking for a good router that can do 802.11b/g/n. It will be hooked directly to a Motorola Surfboard cable router and should work both with Xbox 360 wirelessly or wired and also with two Intel Apple Macs (iMac and Macbook) wirelessly. My Airport Express will not allow the 360 to pick up a signal and I am getting tired of unhooking and rehooking to satisfy both needs.

Any suggestions will be appreciated