Hi there I recently join the SkyDigital with 3 mixs (entertainment, music, knowledge). I also got new standard skybox with the package. Now... I realise that the new skybox (thomson model:121_039, Ver: 4E0904)does not have the optical output(digital). The old sony (5 yrs old) got one... I am bit concern that would not get the best sound out of my package. 1. I wonder if there is any channel in my package output the Dolby Digital signal. 2. Is it possible to use the old sony box? do i get any disadvantages, for example, picture quality, reception?