I have a LG FlatronL1720B, which I brought abot 15 months ago, it has a 16ms response time and cost me £328 at that time. The monitor is superb, no dead pixels and a superb colour reproduction. I would certainly recommend LG and would buy another one if I have to replace this one.
Viewsonic are a well known make as are LG but I would recommend trying to see them in operation if you can before you buy. If you try you local PC World they MAY have what you want and you can see if its suitable. I incidently have a cheap 17" TFT £120 I think it was that I got from Aria, 16ms response time and am very pleased with it, since you want to use it for video editing you're probably better sticking to a well know make such as have already been mentioned.