Is there any difference when using HDMI cables? I've seen some at Best B*ys that go as high as 100 bucks! While I've stayed in the 20-30 bucks range, is there really a reason to buy such expensive HDMI cables? Thoughts? Also, I remember that quite some years ago if you had the proper equipment you would be able to get the "INTRO SOUND" as you would see at the movies... "DTS Digital,Dolby ProLogic, Dolby Sorround, THX, IMAX (IMAX being the best intros )" anyhow... Do Blu Ray's have that built in them or they are just recorded in different formats without any ''sound" intros??