I have the JBL alien speakers currently. Great speakers! But now I'd like to go wireless. And probably battery powered. I have a two story house. Not huge. So we want to be minimalistic. But want great sound and the ability to easily relocate speakers to bedroom upstairs. Without dealing with wires. Would like speakers that will receive from both the Macbook and new iPhone 4. Would like great sound, with great bass - like the JBL Alien speakers. Surround sound an option??? Is AirPlay the answer? Will it work with Macbook (OS X 10.6)? Or is bluetooth the answer? Or is wifi the answer? Does anyone have recommendation?