That Dell is 27" and would require, as Katana1000S said, a new GPU.
Instead, my recommendation is Dell U2311H: 23" screen, IPS panel, very low input lag and very high responsiveness. In other words - walks over any TN monitors and then some.
Look no further.
A couple of reviews:
http://www.tftcentral.co.uk/reviews/dell_u2311h.htm
http://www.flatpanelshd.com/review.p...&id=1275291737