I just scored 2 19" CTX CRT monitors for $20 a peice. I currently have a mag innovision 19" monitor that I do my gaming on. What is the best way to evaluate the monitors and decide which of the three would be my highest performing monitor. Visually, they all look the same to me. I dont want to damage them by pushing them to hard. Googling them has not provided me the info I am looking for.