Currently, I have two Airport Express base stations acting as repeaters for the main Linksys router. I can roam from Airport to Airport fine, but can't do this once connected to the Linksys. I am considering getting an Airport Extreme to replace the Linksys router, but I have two questions. 1. Will roaming work throughout the house perfectly if I switch to an Airport Extreme as the main router? 2. How do you go about setting this kind of system up? I believe it's similar to a WDS, but I want to use Ethernet on each base station because I can and it will be faster than relying on wireless.