As a consumer you will be really interested in 50MP1 not 50PD1. PD (Public Display) is really developed for installs in stores, airports etc. It has a lower resolution then MP model and different reflective capability of the glass/coating. I like 50MP1 very much even though it has some weaknesses = predominantly the way it reproduces black color. I've used AVIA dvd, 5 hours of personal life and was able to achieve a very good picture.
Good luck !