Sorry for such an off topic question, but since you have access to information on the Pioneer, I'd appreciate your help.
I spent the better part of today tracking down the best configuration for my DVD input and what I came up with is that the 6070 looks better with a 480p input whereas my previous display preferred a 1080i input. I'm using a Denon 5900 DVD player that's SDI modified going into a Iscan HD+ video processor, then output at 480p through DVI/HDMI to the display. The test patterns on the processor showed all kinds of resolution problems at 720p and 1080i. I don't have any way of verifying that the test pattern generator isn't at fault, but I think its unlikely that it is.
From a technical standpoint, is it better for these displays to do the scaling than to use an upconvert DVD player or external scaler? I can see an arguement that says that externally upconverting a 480i signal to 1080i, then having the display convert it to 768 causes a loss of resolution, but what does the display do with the same 480 signal. Does it get it to 768 with less of signal loss?