You could get what you have, if you use ADSL. You will need some kind of wireless router (The router you were looking at was an ADSL modem and wireless router, you could also get a wireless router and have a cable going from your ADSL modem to the router.) and then, for the laptop and the pc you can use one of the USB wireless adapters that you linked to, or you can use a wireless PCI card for the PC and a wireless PCMCIA card for the laptop.