Hi everyone!, I am in the process of deciding a blu ray player and I am set on getting the sony BDP S550. I really need help on what type of audio i should do. My receiver is a yamaha rx-v659 and it does not have hdmi. When i hook up the blueray player i will use hdmi only for video as it will run directly into the tv. However what should I do for audio. To get the best sound out of the movies should i use optical, digital coxial, or the 7.1 multi-channel outputs? Also i really dont know what the multi channel outputs do or how they work so I would appreciate any help. thanks!