I have a Sony DVPNS930 and a STRDB1070 amp. It plays SACD's and although I only have one - Dark Side of the Moon - I am well impressed with the format. I am about to buy 101 by Depeche Mode and was pleased to see that it is available on SACD. However I noticed I can get the DVD with 5.1 Dolby sound for about the same price. Can anyone tell me if there is any substantive difference between SACD and 5.1, if it's going to come out of all the speakers anyway why wouldn't I want to have the pictures 'free of charge'?