I'm no expert, but I can tell you about my Airport setup. We have a G4 iMac and an icebook, both with AP cards. The AP basestation was very simple to set up. We used it's internal modem to share our internet access at first. We now have broadband via a cable modem. Again, dead easy to set up. Just an ethernet cable connecting the CM to the basestation. The setup means that we have good connection between Macs and to internet from anywhere in house gardens or garages. It's not cheap, but it is fantastic! Andrew