I can give you the theory and its theoretical effect. But, as with all things, you have to decide for yourself what you think of the PQ.
A PAL TV signal (whether from off-air, DVB, $ky or DVD etc) has 576 lines of picture information.
Flat panel displays all have a fixed native resolution. The smaller or second of the two measures is the number of rows of pixels.
Question: How do you get 576 lines of detail into 480, or 720, or 768 (or whatever) rows of pixels?
Answer: All flat panel devices have a scaler on board. What this does, effectively, is store up the incoming signal, and then recalculate the best colour for each pixel on the display. Which doesn't, of course, co-incide with the lines in the incoming signal.
So, for example, if a given pair of lines in the signal is such that one is 100% black, and the next is 100% white, the scaler may decide that the best way to handle this is to actually colour the row that is exactly where this edge should be, a shade of grey.
This then begs the question: Is it better to upscale (increase the resolution) or downscale (decrease the resolution) of the signal.
And the theoretical answer is - it is always better to upscale, provided it is done well. The human perception is well practiced at dealing with things that are slightly out of focus (softish) but is not practiced at all from dealing with square pixels - because they don't appear in nature. So an upscaled image, although it doesn't actually have any more detail in it, looks as though it does. But it may look slightly soft.
Conversely, a coarse resoltion screen gives a fake impression of sharpness because what you actually see (and mentally believe is clarity) is the fine black grid that is the space between the pixels.
The greater the screen's resolution, the finer (and hence less visible) this grid is.
To put it another way, a <anything> x 480 screen has to degrade a PAL TV signal in order to display it. A <anything> x <anything greater than 576> screen will upscale the signal, not losing anything, and offering perceived (but not real) gains.
For interest, however, NTSC video has 480 lines - so the scaling on a <> x 480 screen is much simpler and results in no loss or subjective gain.
As for your choices - the Panny suffers another shortcoming which may or may not be of any interest - it has a very poor viewing angle below the horizontal, so it needs to be watched from straight ahead or above.