I've currently got a Linksys Wireless router 2.4GHz 802.11b. I've having to reset it more and more frequently and am thinking of replacing it. I looked at Circuit City today and most of what they have now are 802.11G routers now. When I bought mine, the prevelant type was the "b" routers. What is the difference if any? And will a "G" work in place of my "b"?