I will mention that the absolute BEST conventional TV picture on a progressive display like the LT150 is via the DScaler software running on a PC containing a TV tuner card. Have you ever noticed that the projector menus are really sharp compared to the video picture? That is the nature of the difference I am talking about. The improvement is not at all subtle - you look at a fullscreen picture with no visible line structure, one that can only be distinguished from a DVD by the lack of sharp focus - miles and miles better than the built-in line doubler in the projector.
I want to offer a counterpoint to what has been said already about S-Video. The way NTSC television works is that the luminance and chrominance signals are first combined into COMPOSITE VIDEO and then this signal is used to frequency modulate (FM) the picture carrier. Whether you distribute the signal via satellite or cable or OTA broadcast matters little - the major picture degradation occurred when the studio combined the signals before modulation.
You have no choice but to accept the signal as delivered, of course. It is how you process the signal and deliver it to the projector that matters the most at your end. The absolute best way is to demodulate the signal inside a PC tuner card, line double and scale it via DScaler, then drive the projector via the best interface it has, the progressive VGA input. The S-Video projector connection will only be incrementally better than the Composite Video you have now. The progressive VGA input will be significantly, positively, noticeably better than either type of interlaced video input.
When I watch live sporting events on my analog cable, I get a picture almost HDTV-like. The differences are the afore-mentioned softness of focus (from a relatively low resolution NTSC TV source) and a slight amount of noise visible as light horizontal sparkles. On high contrast moving scenes (like a white jersey against the darker playing field), the edge of the moving object displays "combing artifacts", while the rest of the picture is sharper. When I switch to either the S-Video or Composite video inputs using the same source material, the whole picture (both stationary and moving areas) gets so fuzzy and unfocused looking, you frankly could not tell if you had video artifacts at all (yech).
My reccomendation is get an HTPC for your LT150. You can also use it for PC gaming and the best quality DVD playback you can get.
Gary
[This message has been edited by Gary McCoy (edited 09-18-2001).]