@shangshang
I would have recommended either of those 24" NECs but I don't think you can find them anywhere for under $1000. I believe $1099 is the absolute cheapest I've seen.
Also, you have to consider that both of those NECs COME with a calibrator and software, and if you consider they have similar value to the LaCie Blue Eye Pro, you have $700 monitors plus the calibrator. So I don't think there's really much difference if you're paying $549 + $369, because the NEC displays aren't $150 dollars better necessarily (they are in some ways), and paying $369 on a calibrator for a $700 monitor is equally ludicrous.
But what I get from the HP is a deeper calibrated black point (0.17 vs 0.19), which in turn provides a better contrast ratio. They calibrate almost the exact same, and notice, the only way TFT Central got BETTER results with the NEC was if using the LaCie Blue Eye pro, and NOT the packaged calibrator and software. See:
http://www.tftcentral.co.uk/reviews/nec_2490wuxi.htm
You'll see that in the "LaCie Blue Eye Pro software with LUT Profiling" section that they get 0.2/0.5, and the HP calibrated with the LaCie achieves 0.3/0.5. Now if calibrating the NEC with the packaged tools, they got either 0.3/1.2 or 0.4/1.2, which isn't nearly as good a result. (Though still far better than out-of-the-box, and as close as you'd really ever NEED to get accuracy-wise)
So Rasterman, if you want to go $100 over budget, I would recommend at least considering the NEC but I don't know if it's worth the extra money. Esp if you can eek out slightly better contrast ratios from the HP, and with that deeper black points.
Edit:
To the NEC's credit, it does feature an A-TW polarizer whereas the HP does not. I don't really care about this feature as I don't view my monitors at EXTREME viewing angles.