Hi everyone. I am looking to extend my WIFI router reach 2 floors down and 100 feet sideways in a concrete floor and walls 5 story building. Currently using a Motorola Surfboard Gigabit Router for Cable, which barely reaches a MacAir at the destination downstairs. The signal is there, but its very weak. Looking to buy a WIFI range extender, but have no idea which one would work best. Costco has this one: 300N 5 Port Universal WB Edition, Amped Wireless High Power WiFi Range Extender & Smart Repeater: http://www.costco.com/Amped-Wireles...=10701&keyword=866296&langId=-1&storeId=10301 600mw output power and a recent MacRumors writeup mentions this one: BearExtender Turbo. http://store.bearextender.com/pages/bearextender-edge-information 700mw output power I should add that I cannot place the range extender just anywhere between the Motorola router and the downstairs location. My only options are either in same room as the original router or at the destination itself. Any thoughts?