+1 vote for getting a calibration DVD. I got the AVIA disc when I got my Toshiba RPTV and it made a huge difference.
As for the warranty question, it's your call but here's a little insight
. The story's a little old now, but the song remains the same, as it were.
There's a reason that he told you that they get a lot of claims. I'd say that if you're going to have problems, you'll encounter them within the manufacturer warranty period. Enquire about being able to purchase warranty later on, like four years from now.