1) How long do routers usually last? Shelf life I guess you could call it, just like every few years when someone buys a brand new computer. 2) If looking into buying a new router what are the good brands to buy? I have a D-Link DI 604 already. 3) Wireless or wired? Which one? What are the advantages and disadvantages of each. The reason I'm asking is because everytime I walk into a store a sells rep. is always trying to get me to buy wireless. Thanks.