Just my 2 cents I have had 4 different models 2 plasma ans 1 lcd and 1 dlp and they all have delay when playing call of duty 3 on hd. If you want a good picture stick with a crt.
I returned all my samsungs 40' and bought a Sharp Aquos 37 inch and it is amazing. Even in 480p it looks better than the samsung in 720p and it has no delay. All out awesome tv.
my brother has a 54 inch TV i believe and theres no delay. Its an HD TV too, but its not one that hangs up on the wall. The game looks really good on the TV.