I use both an Extreme for its dual band capabilities, as well as an Express to make use of AirTunes. I've recently moved into an apartment that has caused me to have to rearrange how certain things are set up. Before I had the cable modem plugged into my Extreme, but due to where everything is now it would be more practical for it to be plugged into the Express. Does this matter? Will I be able to use the extra features of the Extreme if it is just the 'extra' router on the network? Or does the modem need to be plugged into the 'main' (Extreme) router? Thanks!