Assuming the bouncing small dots are indeed part of the source material, does it matter that you can only see them when you are up close? Realize that grain is part and parcel of film.
Please search my posts in the TV subforum for a PDF guide that will help you apply SM offsets to that TV. Nibhaz has also posted a much shorter, diluted version of the same PDF.
I have zero experience with the PS3, but I have reason to believe that it is worth playing with the "Superwhite" setting. I can't remember if it's better to have it on or off, but that it might even have more relevance with the Onkyo 805. Speaking of which, you can also search within the 805 thread at AVS, and I'd look for the specific posts of one person named BasicBlak.
Does your Samsung apply 3:2 to film? What about the Sony (and does it use FI as well)? Because the S1 applies 3:2 for sure. There may only be a slight difference, but see if 24p is set to on in your PS3, and whatever the setting might currently be, try both. Oh yeah, I believe that the PS3 can actually force 24p unlike some other standalone BDPs. Anyways, just brain-storming.
Again, I doubt there will be much difference, but try the HDMI straight from player to Panasonic. If there is a significant difference, please refer to the Superwhite experiment when connecting with 805.
Lastly, I know at least for the G & V series, there is an update for HDCP specifically with Onkyo, and I believe that FW is named 1.25. There has been some argument whether FW is cumulative, and it's also stated that you have to directly ask for this FW, because Pana doesn't want people that don't even own Onkyo to mistakenly dl the FW for nothing. However, your issue doesn't seem to have anything to do at all with HDCP, and I decided to keep blabbering, er, brain-storming . . .