I am planning on adding a router to my house via an ethernet cable. I live in a guest house and my landlord lives next door. She has a modem/router (DSL) from centurylink. My house is too far away to receive wifi signal so I will get my own router. She's fine with that. When I hook it up I will disable the DHCP and change the IP address. She also complains that her Internet is slow. My question is if I get a fast router (such as an AC1750) will it perform better than say an N300 or is the performance tied to her combo box?