If you look at this site (http://www.hdtvtest.co.uk/Panasonic-TH42PX80/Settings/) you'll get the easy way to set the px80. I used it then, after a few day,s used a thx optimiser and guess what ? Yeah, it was spot on- no changes required.
The only thing I did to avoid screen burn ( I knew it wouldn't be a prob but .....) was watch any channels with a constant logo on zoom 1 for a while. Since then no probs and its good with all sources.
Enjoy
I'm anispeptic, frasmotic, even compunctuous to have caused you such pericombobulation