I need a monitor that represents its image without any distortion to the proportions in the horizontal and vertical axes. In other words, if I draw a circle or square, I need these figures to be precisely what I see on the screen. I've noticed my current (old) monitor stretches the image in the horizontal axis. I used to have a Sony screen that didn't do this, but that died. One of about 14" would be fine and I am happy to get one second-hand. Any advice? TIA..