I have a Verizon Ethernet Modem, and I want to be able to not be tied to my desk with my laptop with my modem. I was thinking of buying a Airport express, for the travel ease, and use it in my house. But what is the range of the signal strength? And will it work with my internal Airport device...an etc? I just want to know if it is worth it to buy, I just hate being tied to my desk with a laptop!!!