When buying a montior its important not to mistake input lag with response time. Input lag is going to be the amount of whatever game you are playing. Example, SFV has 8f input lag, but my monitor is a 1ms response time. That will not make SFV input lag decrease. Response time is how long it takes for a display's pixel to go from either black-to-white or gray-to-gray. it's
usually the gray-to-gray response time that it advertised as this is usually quicker. A good response time prevents ghosting (where you see blur on moving objects and stuff).
Tons of people are actually wanting to know about input lag which is the delay between a display receiving a signal and it being shown. Basically, how long is the delay between pressing a button and seeing it happen on screen.
You want both these numbers to be as low as possible, but honestly most monitors have similarly low response times, whereas the input lag varies much more, and it's the input lag that you want to be focusing on. You can find databases where external people test the input lag + actual response times to find the real "delay" from you pressing a button to it actually happening on screen.
Input lag is a much more useful number to find out & decide if u want that one or use the online sites to figure out the true delay. A monitor may have a response time of 1ms, but an input lag of 40ms which, for simplified sake, could give us a delay of 41ms. A different monitor may have a response time of 10ms, but an input lag of 12ms, giving us a delay of 22ms. Based on the response times (which are usually what is advertised), the first monitor seems to be the best which isn't necessarily the case.
IN MY HONEST OPINION, it doesn't matter what the response time is. You need to find out the inout lag of the display you want. Back in 2012 when i started playing on monitors, i went through at least 5 in a span of a week just testing. I went through a variety of Brands, Acer,Asus,BenQ,Samsung,and AOC. The one that preformed the best was an AOC 5ms monitor. Second, was the Asus. Followed by BENQ ,Acer,and Samsung being the least satisfying. Keep in mind my Asus was 1ms, BenQ was 1ms, and the others were 5ms.
The monitor i use now is the same one from 2012 and its still amazing. Here it is if you want a look.
http://www.amazon.com/ASUS-VN247H-P-1920x1080-Back-lit-Monitor/dp/B00AVYNS7M
P.S. I paid $120 fot it back then, im sure you can get it for cheap now. BenQ Vs Asus is a whole diff topic, but lets just say that literally it's all branding. Either one is fine
