That sony tv should have a game mode that you can use. It is what i use on my Sammy led lcd for games and it works great for reducing video processing lag by turning off the processing that is not needed.
Try reading the plasma vs LCD link that was provided in your previous thread! Although the thread may have started a while back, the information it contains is relevant and there were postings into 2010.is there any advantage to having plasma over lcd or visa versa these days? or is it just preference mostly