I'm running it in THX mode with low contrast for the first week or two, seems to be the recommended route.
For sure. Although as far as I know if you are displaying full-screen moving content it's best to put it up to normal contrast in order to age the phosphors as much as possible. Or use retina burn mode if your eyes can take it and you don't care what's on.
You want to get the phosphors past their fast-aging early life and into the slow-aging life. In an ideal world I guess you'd put it on a super bright white screen for the first few hundred hours. No idea how long the fast-aging period is on modern plasmas but when I was buying it varied anywhere from the first 200-1000 hours, and I'm guessing it's probably similar nowadays.
Years ago I bought a sammy plasma and I can't remember exactly, but within the first maybe 10-20 hours of owning the TV I displayed white menu items for a bit too long (like 3 hours, I got absorbed by Smackdown vs Raw character creator...). Luckily it was only temporary image retention as it took about 20 hours of leaving snow on overnight to get rid of it. So they can probably handle a bit of punishment early on, but definitely best to be careful.
Sorry if I just said a bunch of stuff you already know. I still get carried away while talking about TVs.
