Regarding response time:
Even though the general rule indeed says that the lower the response time, the better, you should be aware that the stated response time is not to be trusted blindly. As of today, there are no set standards of measuring response time, which means that the different manufacturers way of defining how fast, say, an 8ms panel in reality is, can vary greatly. In some cases you can discover that a panel keeps up to its 8ms promise on the grayscale, but when comes to certain colours, like red, the picture will smear like no picture on an 8ms panel should.
The only way of knowing how good these screens really are is by seeing them for yourself. If that's not possible, I would at least recommend reading a few independent reviews before deciding which one to go for (which it looks like you have :-)).
