I just want to clearify my understanding of these 2 standards. As far as I know, DD EX (or THX surround EX are they the same?) encodes the back surrounds into the side surrounds and the receiever retrieve it to play into the back surround. Now DTS ES is similar to DD EX but there is now a DTS discrete ES that has a specific rear surround channel. Therefore, the DTS discrete ES "should" be better sounding than the DD EX. Is that right? Also DVD with DD EX can be decoded with receievers with DTS ES since it would retrieve the back surround using from the side surrounds. In terms of quality... would there be any difference between DD EX played this way via DTS ES vs a receiever that can decode EX directly? Could someone confirm this? Thanks for all the help, K.