The first one has a 5 ms response time, while the other has a 2ms response time. I play a lot of FPS games, and MMO's, so I don't know if I would experience a lot of screen tearing with the 5ms.
Also, I am running crossfire, and have the option for DVI and HDMI, which output am I better off using?
Sidenote: Been looking into LG monitors and while they ARE expensive, the display I've seen at best buy has been great. But someone told me that you can get a good looking display with almost any monitor with some tweeking.