Want to buy an HD TV, but I do not know how to find, select the best set of features? Here is a brief guide to some of the technical specifications will face more often. Contrast ratings - a measure of the darkest black to white, the brightest - Panasonic has a 18000:1 contrast evaluation for their best plasma. In almost all cases, you will notice that plasma TVs have better contrast ratings than any other HD TV [...]