Hi guys. Im an aussie and we unfortunately dont have any HD-DVD's to purchase as yet. I am considering importing the Toshiba for my panny AE700..im pretty impatient hehe. Now i know mostly about the video aspects of the format but I havnt really heard much in the way of the audio. I've noticed things like Dolby Digital Plus, and Dolby TrueHD. Can someone fill me in on these. As in, does every HD disc include both, or only 1? And are they capable of running on any reciever? I ask because im about to update my Yamaha RX496(yep pretty old), and i dont want to buy now if current models dont decode these new HD formats. Obviously they must be higher bitrate or something, so if it downscales and sounds the same on current hardware then I wouldnt be getting all the benefits correct?