How you tell what version hdmi your cable box is. My cablevision hd dvr cable box is a few years old, but cablevision said that they update their boxes at night. Using a ln32a550 lcd tv with high monster hdmi cable. Anyway I just might trade in the dvr box for a new one

For cable, it really doesn't make a difference, you won't be taking advantage of the newer features in the more recent versions.