Currently, I am borrowing a friends Airport Express to run wirless internet throughout my house. It works perfectly, and the range is just enough to not cause any problems. I want to return the Airport and start being a little more self-sufficient! I am trying to decide between buying my own Express or making the jump to the Extreme. What do you guys think? I have two computers in the house. Soon to be a brand new iMac, and an older 800mhz 15" iMac. I do currently send music (over airtunes to our living room surround sound system. But I would also like to eventually use time machine over the network if possible. What choice do you think is best for me? What specs should sway my decision?