I've been trying to find a use for the Astar MP-32HB HD TV that I got a couple of years ago. When I got the Sony KDL52W3000, I moved the Astar to my bedroom. I ran it on cable-ready for a while but that was all SD. Then I got a second HD DVR for it.
That had a couple of problems. First was the cost, about $30 per month to Comcast. Second was the noise. The hard drive kept spinning up and down. I replaced the DVR once but the second did the same thing.
Really, all I watch back there is the 10 o'clock news and the late night talk shows. It seemed silly to spend that much money for that but I had gotten where I liked the HD quality.
That's where I was when the digital TV transition happened. What that brought was that Comcast started carrying the local stations in digital format and in HD resolution. Unfortunately the Astar doesn't have a QAM tuner.
What I did is got a KWORLD SA290-Q LE from newegg.com.
Notice that it will also do VGA out so you could drive just an old PC monitor.
Read the reviews on newegg.com. Lots of people complain about it. The setup instructions are non-existent but the comment thread helps a lot. I bought a cheap programmable remote (GE 24950) and replaced the terrible remote that comes with it.
It has a bright blue light indicating power. That wouldn't do in the bedroom. I covered it with a 1/2 inch square of black duct tape. Perfect.
I feed the Comcast cable directly into it and get around 30 digital channels, no cable-ready although I had expected them also. Most of the digital channels that I've checked are HD, some 720p, some 1080i. I use component video to drive the Astar.
It'll pay for itself in 2 months.