I just purchased a 55" hd-ready rear projection set. I also have Dish Network feed coming in on a high-end S-Video cable. Over time, my signal strength has dropped from around low to mid 90's to around low 70's range (basically been too lazy to re-adjust). I never really noticed many problems on my old 32" set, but now that I have the projection set, i definitely see more artifacts, fuzziness, etc. I expected some loss of quality but I am wondering if signal strength will effect the picture quality or not, especially on a larger rear projection set.