I feel you about going bigger. I'm upgrading from a LN46A650 that still looks great and is going in the bedroom. We had a 60" in here for a second (mistake stress purchase, the 6400 which is going back Monday), and it just was too big. At about 6-7 feet from the set, things like regular cable and sports looked so pixellated.
65" would be really nice for letterbox movies though! Someday when I have a bigger living room . . .
I am a servant of the Secret Fire, wielder of the flame of Anor.