I am trying to determine what HDTV Plasma 50” to purchase. The two I am most interested in are the LG 50PY2DR and the Panasonic TH-50PX600U. Both have the features that I want with the LG having the advantage of a built-in DVR. I would appreciate input from any who have experience with these units. My focus is quality of picture/sound and reliability of the product. Thank you.