I went through three U2913WMs because of dead pixels and then decided to ditch it and go with a BenQ XL2411t. I had heard it was great for gaming because of the higher refresh rate and pretty good picture quality to, at least for a TN panel.
Well I played around with it for about a week and yes the smoothness is great but you sacrifice virtually everything else.
The picture quality, even after the best calibration I could do, was no where near the level of the U2913wm straight out of the box. Also, the viewing angles are so bad that even if you're looking dead centre at the XL2411t, there is colour shift at the edges of the screen! Also the fact that the maximum resolution is only 1080p means I was getting less screen real estate than I was used to with a 4 year old HP 24".
So I put the XL2411t back and got another U2913wm and, thank the lord, this time no stuck pixels!
Yes, there is a decrease in smoothness but everything else about the U2913wm is in a league of its own. If you are a competitive online FPS player then sure go with the XL2411t, but if you actually care about what your games look like and want to be immersed in them, then there is currently nothing better than the U2913wm.