Nevermind... After some research, I bought two Dell Ultrsharp 2209WA monitors. These are e-IPS pannels and are far better in colors and viewing angles compared to the ordinary TN pannels. IPS pannels are expensive but worth every penny ...
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The Dell Monitor is superb, clear, and is calibratable, a quality necessary for all serious photographers.
Xaibo, I use NEC 1990 SXi for three years. Superb monitor! It was calibrated on a factory! Unfortunately it is not in a stock now. You can look at new NEC series. Also NEC has good support service. I had receive an answer about advanced monitor gamma setup quickly.