I posted an earlier comment regarding the upscaling feature of the 2808CI. Turns out that my (and apparently most) 1080p plasma TV upscales a 480i signal already, which is why I don't see any noticable difference when it gets upscaled by the 2808CI. As I also learned, "upscaling" generally doesn't mean a clearer picture, just that it "upscales" it to be displayed on a larger scale (ie 480 lines to 1080 lines).
I found that the NIGHT feature does not work very well. Although there is some volume reduction when turned on, there is no appreciable difference beyond LOW. The MED and HIGH don't appear to lower the sound any further. DENON suggested doing a total reset which I did with no change, other than wiping out all my previous system settings.
All and all I am extremely pleased with what I have learned so far (still much to learn). I especially appreciate the (3) programmable (macro) "Call" functions which allow you to store up to 32 keystrokes each (e.g. turning on various components as well as making various changes for those components). I've got the 3 functions set up as follows: (1) Turns on TV, changes TV to HDMI 2, turns on DVD player, turns on 2808CI, then changes it to DVD surround sound cinema mode (2) Turns on TV, AMP, then changes it to GAME mode, and (3) Turns off all components including DirecTV box, DVD, AMP and changes TV to HDMI 1 before turning off as well (so after the kids are finished playing their games using HDMI 2, I don't have to change it back to watch regular TV on HDMI 1. I love it! The kids do as well ... they only have to deal with one remote now (the 2808CI remote).
One thing I did learn in programming the "CALL" functions. When turning on a component you have to give it time to 'turn on' so you must turn on something else to give it a chance to warm up. I don't have a VCR so I inserted a TURN OFF VCR sequence to allow some "pause" time before going back to the TV (ie when wanting to switch between HDMI 1 and HDMI 2.