The LG has a 5ms response time while the other two have 7ms times. All other specs seem similar so being as response time is important when gaming it would seem to be the better choice. Going strictly by the reviews though, the Dell seems to be the better unit as it doesn't have the "dimming" issues of the LG. The HP seems to have a lot of reviews with color profile issues, but those can be resolved in most cases by adjusting the profile. Although the LG is faster, the other two might be better options and personally I've had better success with HP monitors than Dell.