I am looking at flatscreen TV's. What is the major differences? Is 1080i that much better than 720i? (I have DirecTV) When comparing HD pics side by side at Circuit City, the Sony seems blows the rest away for picture quality. I am looking for around 40" and it will stay on pretty much all day (I'm a Fox News addict) . I have noticed that the sports bars seem to prefer the LCD's because they seem to last longer. Any suggestions or websites that may help in my decision?