Hi, new to HD with a few questions. I just got an HDTV and went down to Cablevision's store (Hauppauge LI) to pick up an HD box. They gave me a Scientific Atlanta Explorer 4200HD. What's the difference between this and the 8300HD. Mine does not have optical digital audio output on it, which I need for my receiver. Also, does Cablevision out on Long Island offer other boxes? Can I bring it back and request a different one? Do they have models with one of those DVR or PVR type things, where you can record and watch later? Will it record in HD?
Also, I've noticed that some HD channels look much better than others, particularly bad is the Universal HD, which to me looks very smeary most of the time, but I guess it depends on what is being shown, because last night I watched a bit of Hard Target on Universal and it looked pretty good.
Sorry if any of these are stupid questions, but this is all new to me. Thanks in advance.