Your line speed have nothing to do with the Wifi signal of the router. If you are getting a weak signal it's because the distance you are from the router itself. Slow line speeds will not affect your signal off the device whatsoever. Those are two different battles altogether. If you are getting weak Wifi signals, try moving the router to the center of the house, or purchase a seperate Access Point to provide a better wireless coverage. For a price for quality, I would suggest a D-Link DAP-2553. It's in the $150 range, but I'm extremely satisfied with the signal and speed I'm getting with it. Plus, PoE is always handy so you can get the device in the perfect position.