Let the hive mind of Engadget get that for you.
"I am looking for a device that will stream sound from one source to several recipients. For example, I want to stream sound from my TV or stereo to my phone or MP3 player that has radio and Bluetooth capabilities. I have looked into radio transmitters and they seem like a decent choice, but I can't find one that uses external power (USB or from the plug) and I would want one with a transmit range of around 50 meters. Thanks!"
As far as build quality goes though, the unibody macbooks are the first laptops I've handled where there's ZERO flex when you pick them up. Even by a corner. They feel like solid lumps of metal. Hard to describe until you use them for a while.