Have been watching bbc hd on virgin on my pani px80 42" and to be honest I cant see a great deaI of difference. I know the tv upscaIes SD anyway so is this why I am not noticing much difference?. WiII I see a big difference if i get bIu ray? ExampIes of programs watched are wiIdIife ones and few entertainment shows Iike Iater.. and Jonathan ross show.