The answer is for you to try them all and find the best. However most sets, if you read the reviews have us turn on GAME MODE and if that's not there turn off any and all motion processing.
I just got a Samsung 55" 6350 smart tv and was wondering what would be the best settings for gameplay? In regards to the "smart motion plus". for example Dead Rising 3 is not a fast motion game but it has vast graphics at any given time. Then there are racing games that do have fast motion.
Ive already played "The Last of Us" and it looked awesome with its current (default) settings, but it is not a fast motion or vast graphic (at any given time) game.