So based on advice on my research through these forums and the good reviews I bought the Panasonic 42" S1 and have been very happy with it. Now I am reading all of this stuff about the black levels degrading over time and dont know if I should be worried or not. I ask this because I can return it up to this monday and then my 30 days are up. Am I really going to notice this with general TV and movie watching? I paid 699 for it which was a great deal. If I take it back I would have to get an LCD, probably a new Sony EX500 or something that would still be in my budget. Any advice? Thanks.