I'm getting the new Apple TV and will be hooking it up to my 5.1 surround sound system using the HDMI port. But I want to use the optical port on the Apple TV to also send audio to a second set of speakers. The problem is I can't find any cheap amp, receiver, or powered speakers that accepts an optical cable. I'm looking for something in the sub $100 range for amp or receiver only and a bit more if it includes speakers. Any help would be greatly appreciated!