It's (video) all moot if you don't have a very good display. Like speakers and av gear, if your system isn't revealing, you won't hear certain differences. So, if you don't have a very good dislay, you may not see the difference between the 80 and the 83. Keep in mind, power cords, conditioners, quality of electricity and quality of HDMI cables all make a difference in being able to see the difference in BD/DVD players.
Technical Question
I know if I use the "analog audio" outs of a CD player, the actual player is doing the DAC. If I use digital out (optical, coaxil), the receiver will do the DAC. Now, does the same apply with video? If I use the HDMI connection on a blu ray player and connect to my TV, does the TV do the actual video conversion? Just curious...If the TV does the conversion, why spend more on a top line BD player (disregarding features...just talking about video quality)?