i have an emac 1ghz as well as a powermac g4 1ghz. both will accept an airport extreme card. so i understand now if i wanted to share/transfer files, printers, i would benefit from an 11g router but as far as a cox cable modem connection goes, 11g speed i will not benefit from because the max download/upload for cable modem is 3Mbps correct? also, will i need airport cards or can i just connect via ethernet to the router? thanks!