All these newer samsung LED-LCD edge lit models you posted have very high input lag even in "Game Mode" and "PC Mode". If you're primarily using it for gaming I would suggest looking for the last years KDL-55EX500 or KDL-60EX500 120hz LCD model from Sony which is around 40ms input lag in game mode. Remember one thing though, the bigger your screen gets the more input lag its going to have compared to the smaller 46" and under guys.
The absolute best gaming LCD monitor with lowest input lag on PC Mode is still the Samsung LN52A650 model from 2008.
Heres a good thread with people testing all sorts of LCD and LED-LCD sets out there for input lag.
Heres a link to the 55" LCD from Sony for $1299
http://www.lcdtvs.com/prodinfo.phtml...=LCDTVSFroogleEdited by VinhDiezel - 3/24/11 at 1:24pm