I'd go with just what you looked at. The linksys wrt54g and the pci adapter. You shouldn't need the Linksys range extender. If you think you don't have enough range, go with the 7dbi antenna's that Deaf Pimp mentioned. In my house i have, wrt54g wireless router, 3 laptops wireless with builtin wi-fi, a wired desktop beside the router, and 7dbi antennas. The antennas are overboard. I doubt you need anything more than the wrt54g and matching PCI card.