The BenQ XL2410T 23.6" monitor may do the trick. You did not mention 120hz, but in order to get the lowest input lag, you have to go 120hz. When it comes to input lag, response time may matter, but a higher refresh rate matters more, and a 120hz TN display will have both. A 60hz monitor with 2ms response time will have more input lag than a 120hz monitor at 5ms response time.
Do you have a price range?