I have the NEC PA241W that comes with the calibration kit. I have had it for a few years now and honestly, it is impressive. I have also had Dells, Apple's offering (Cinema 30") and worked with Eizo's etc.
Get what you think will fit your budget and above all - make sure you can easily calibrate it. I'll quit now just shy of telling you that the NEC with calibration is a very fair price for what you get.