I made the switch to the TH-42PA20. I compared a scene in the hulk where there were blurry gradients and I noticed that the banding showed up most on this scene. When I looked at the panny, it was less noticeable. Not gone mind you, but less of it. I also noticed other things about the picture too which made it look better to me (it's blacks were better handled by it's technology I guess).
I'll elaborate on the blacks issue. As I have posted in the past, I find plasma displays have this "sparkle" or "organic bacteria" type of behaviour. When they are attempting to match a colour or colur combination, the plasma is attempting to get some kind of general area best match and as a result, pixels are changing colour varients across a given area. when viewed (up close), you can see this behaviour quite clearly (and some plasma veterans have agreed and verified that this behaviour is native to plasmas). Having said that however, I noticed it even far away (8-12 feet). When I say I noticed it, I mean I can see it happening, but not like I see it when I stand up close. Well, the panasonic seems to have much less of this than the JVC. I have looked at the same scenes, Xbox (XBMC skin output), PS2 black screen, gray browser area, etc, etcc and can most definitely say (for me) that the picture is better, less posturization, less sparkle.
The only thing that really irked me (and if the picture quality was only slightly better I may have decided not to swap) was the fact that the panny does not support 720p. What is up with that crap? In this type of technology I see no excuse for this. Furthremore, I noticed the HD version (PX) *also* did not support 720p in the COmponent inputs (only supported it in the RGB VGA connector). That is crap.
Calvin