Looking for advice on improving WiFi signal in my 3 story home. Currently it is not good, no wifi in garage etc. My Shaw Hitron Modem (soon the XB6) is in the basement where my feed is. I have wired Cat 5 connections on the main floor. Can i shut off the wireless on my Shaw Modem, purchase a new router, connect that to cat 5 and place on main floor. If so do i need a switch? Will the signal be stronger with this set up? Thanks for any help.