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!"
peter,
if your receiver supports it, i would suggest wmapro @ 1.5mbps. it has been compared to as the vc1 of audio codecs. i am currently running the hddvd drive at these settings on my pioneer receiver and have been very happy with the results.