Let the hive mind of Engadget get that for you.
"What is the best wireless surround sound speaker solution? I have a home theater where running wires is just not feasible. I have my own speakers, so I don't want a system that has speakers with integrated wireless. I've done a far amount of research and have only come across a few companies that even offer a reasonable solution: KEF, Kenwood and Rocketfish. Is there anything else out there? What do you recommend? Thank you!"
And please remember that if you will use this antenna outdoors, consider wind-load. The bigger the antenna, the more wind-load. plus home made antennas are usually less sturdy than commercial ones. (Atleast mine are) But if you have the room to shove this in an attic then, this is great. more power to you.