Too bad USB is not an option for you, then. Your pc must be in a
public place?

Do you intend to use both of the 600N radios at once ? Linksys
suggests this as a possibility.

In this case, get their N card and also a Dual A/G, I suppose.

Or do you just plan to use one band, but want to switch back and forth
depending on, um, current interference? Or ...