I run triple AOC led ips 23" monitors. They are affordable and have super thin bezels which is key. Think I paid less than 600US for three of them. The catch to the cheap price, only DVI and VGA inputs. If you can get past that, they are great for the price.
I dont remember the response time, prolly 5ms as its a ips panel, but I have no issues at all competing in FPS games on them.