Its about bloody time you got a new tv too. I'm pretty sure I heard your old one growl back a few times when you were hitting it upside to get the screen to work!
I'm now playing on a 32" LCD and i sit about 2ft from the screen
Saying that, I think getting my gaming headset improved the gameplay much more than the HDTV. The immersion you get from cutting out all other sound apart from the game and being able to tell where someone is by there footsteps can make you feel like a ninja with a gun at times