I needed a new LCD monitor and shopping for one was a total headache. I had to return 4 monitors before I found a great one for $249. It was the E2752V AOC.
In the process of doing this, I learned a ton about LCDs since the last time I purchased one. For starters DVI is on the way out. The majority of new LCDs will have only HDMI. After doing some research I found that the speed of HDMI is the same as DVI and it carries sound. I also discovered some ways to test monitors.
1. Check for dead pixels, by using a black background or use this software: Monitor Test
2. Check red text on gray background.
3. Check movies for blurring when people walk from one side of the screen to the other.
4. Check viewing angle as this will throw colors off at the bottom or top of the screen.
Finally the next generation LCDs are IPS, which offer much better resolution and colors than current LCD but cost more. Make sure you have a video card that supports HDMI and an HDMI cable. In a year it is going to be hard to find DVI.