OK, I have seen a trend concerning the video processing capabilities of this receiver. Here are my thoughts and feel free to corect me:
1. This AVR has the ability to upscale to a resolution not supported by any display owned by anyone here currently if I am not mistaken.
2. There is little to no need to do any upscaling in the AVR for viewing on today's displays because they have their own processors for that and anything exceeding that results in problems. (Read, do any upscaling on the display when you can)
3. ISF calibration, while handy, seems to only be useful for displays that have poor CMS adjustments on their own. If that is the case, giddyup and get the proper calibration tools.
4. Use the through setting whenever you can because your display knows what it likes and what it can do. Adjust settings in the display because you can potentially adjust settings in the AVR that your display does not like and displays poorly. Then you will be here saying the processor in the AVR is substandard when it probably is not.
5. Projector owners, you know the deal here. Either your unit has a good video processor or it does not. That is where you may need to play around a bit. Most BD players will upscale or play what you need for a good picture.
6. Finally, for me anyways, I believe any display calibration belongs within the display itself. While the 809 touts quite the video calibration and upscaling capabilities, I feel you are better served using your display's menu. Most times anything your display cannot upscale, it will not display correctly either as it will attempt to downscale or display errors such as stuttering or artifacts. Bottom line, use your display and skip the AVR upscaling for most sources.