Next week I'm going to start looking at real Plasma displays (instead of just reading about them and thinking I should really get around to checking some displays out). When I was shopping for speakers, I had a few CDs I took with me to check (they covered more or less the range of music I like to hear). I guess it makes some sort of sense to get a couple of DVDs to check displays. However, I don't know which movies will best emphasize the difference between good displays and bad displays. I'm also worried that instead of comparing displays, I'll be comparing DVD players in different stores. So what should I do? What's the recommended way of checking a display's quality at the store? Thanks.