I want to use my ATV2 as an airplay speaker destination when my TV set isn't turned on. I'm thinking either a set of speakers with optical audio to plug straight into the Apple TV, or a sound bar that uses HDMI. Problem is, search is proving fruitless. Googling for "hdmi soundbar" shows up an outstanding number of products that not only don't have HDMI, but the string "HDMI" doesn't even appear on the page. Good job google! So I figured I'd come straight to some experts. Hi experts, got any recommendations?