Yeah as the others have said, you want to set teh DVD player for progressive and then set it to AUTO, that way you get 480p/60 for NTSC and 576p/50 for PAL, that way there is no framerate conversion going on.
NTSC will be razor sharp and Pal will look pretty good too as the Panasonics do a very good job off down scaling.

No Darling, I've had it months!