For me, running an optical out from the tv to the receiver is much easier. Less communication between the receiver (Bravia Sync, ARC, CEC, etc) for things to go wrong or not handshake correctly. ARC can have issues as well. If you do use an optical cable, just turn off the tv's speakers and make sure you select the correct input (for the TV/Optical) on the receiver. That's how I have mine setup (OTA tv only) and use the receiver all of the time for any audio source (blu-ray, ATV2, OTA tv, etc).