Here are some HDTV quandaries I am encountering. I just bought an RCA Scenium HD50LPW164. After the new High Def cable box was installed, I noticed that the supposed digital channels were fuzzy. I expected that. The High Def channels kicked butt (thank Christ for ESPN High Def). OK, the sales person told me to get a Jensen indoor TV antenna for over-the-air High Def to supplement the built in tuner. I get the same High Def channels thru the cable box. The problem, I only get NBC and ABC in High Def on either input. I've heard on the other channels (FOX and CBS) that they were broadcast in High Def. I don't get them , in High Def, on anything. I've done a channel search with every different connection possible. I still get only a few channels on Antenna input. WHY? The next thing, my digital cable box(Scientific Atlanta Explorer 8300 HD)has HDMI capability. The TV does as well. Initially, the TV,DVD player/surround receiver combo, and cable box were installed with composite video and analog audio. So, after the investment of $200+ for a high end HDMI cable,optical and digital coax, upon getting home to connect the units, I got a surprise. My TV said "Your TV does not support HDNC... (not HDMI)...please try another connection". I had no sound thru the receiver, a piece of junk Wal-Mart Phillips HTiB with DVD all-in-one. I went back to the composite/ analog connections. I know I need a new receiver and DVD player. I am worried about the DVD player I bought (Toshiba SD-5970 with up-conversion) being compatible. Is the TV going to recognize the HDMI connection? Is it going to be worth a SH--? Am I relegated to analog sound from my cable box? Should I even waste my time looking for a great surround sound receiver? I have only one HDMI jack in the TV. Is an HDMI splitter warranted? Will the TV connect to either the cable box or DVD player, or both at the same time? What are my options? The constants are the DVD player, cable box, and TV. Unless I get mad enough (I have 30 days). If I want to change the variables, what should I look for as far as: connections, cables, surround receiver, compatibility, quality audio and video units and still be within a reasonable budget?