I am patiently looking around to buy a 37-42" LCD or Plasma TV. I have spent a lot of time researching many products and the pros and cons of everything. I am concerned that many sets with full HD capacity that can produce, apparently, fantastic full HD pictures, let themselves down with a below par SD picture. I am aware of some (a few) notable exceptions. It may be a naive question, but why is this? I am holding back to await the Toshiba Z, Panasonic 37LCD and new Sony range. I regard the whole scenario as fascinating and absorbing, but alarming when one considers the price of these products.