I am considering the Pana 720..older model versus the Pana 1080p. I don't think I can see much of a difference in the image while watching TV or a regular DVD. However, the store clerk (best buy ) told me you WOULD notice a big difference if you played a blue ray on the 1080...it would be a big improvement over playing a blue ray on a 720. Is this true? Is it worth the extra $400 for the 1080? I am putting this in a fairly dark family room with couches about 8-9' away. Mostly will watch regular TV, DVD/BLue Ray and Wii games.