I'll wait for the 3rd generation 3d-tv stuff before I even begin to think about it...next purchase might be a 240Hz led LCD...if I can't find one in the price range I'm willing to pay, then it will be a 120Hz...still a step up from what I have and it's only a year old.
Betty, don't sweat it...as long as you don't leave the screen sitting on a single image for a couple of days, you won't have to worry about burn in...next time say away from anything that doesn't say Vizio, Samsung, Panasonic, Pioneer, Toshiba...and get the extra warranty unless you see the 5 yr mfg warranty in writing.