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!"
Why is it strange that it would last 15 years? And LCD or Plasma will last 60000 hours, thats 20.5 years at 8 hours a day, every day. Realistically, you can expect 15 given power surges, mishandling and such.