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!"
Well that was a really annoying and unhelpful article. "Converters 1, 2 and 3 are all pretty expensive (but we won't list the prices) but do everything you need, while the $20 converter that everyone knows about won't turn the system on or off."