Hello, I have two Airport Express devices (one "N" and one "G"). I am not sure if I have them properly configured because my wifi network keeps slowing down to a crawl. I have a fiberoptic line and a modem that was supplied. Currently, I have connected the "N" Airport Express to the modem and set it up as the "main" unit. I then setup the "G" Express to "participate" in the wifi network that I created. I am also using the "G" Express to connect to a stereo so I can stream music via iTunes. Should the "G" Express be setup to extend the network? Also, which channel is generally the best to chose? Thanks in advance (I have been battleing with this for a while).