TimeKeeper's suggestions are good, save one -- refresh rate is irrelevant with LCD panels.
With a CRT, 'lit' pixels are on for a only a brief instant after they've been hit by the electron gun inside the picture tube. To give the illusion of being continuously lit, a given pixel needs to be continuously hit by the electron gun. The more frequently this happens, the less flicker. This is where the term "refresh rate" comes from. Unlike a CRT, LCD displays don't need to be refreshed as the pixels are either on or off until explicitly told to change state. Running an LCD panel at 60Hz provides a quality, flicker-free picture.
Another metric that may be important to you is viewing angle. Better, modern LCD panels have a viewing angle that approaches that of traditional CRTs.
To choose a panel, why not head to a local computer store and do a side-by-side comparison? You just might be amazed at the display quality differences between panels. Before comparing, however, be sure to calibrate each monitor using whatever "auto calibrate" setting is available.
Hope this helps!