Is it worth it? Of course, only you (and your eyeballs) can decide for certain. Unfortunately there's no way to see a sample unless your neighbour has one...
To my mind spending a thousand dollars on an NEC LCD2490WUXi (mark 1) is worth it -- I just can't afford it (though if only I hadn't stopped playing the equities markets last spring... I missed out on the greater portion of the rally, ugh). You're likely to get a superb IPS display, 1920x1200, and sRGB.
At the opposite spectrum, I think the Dell 2209WA and NEC EA231WMi are also 'worth it', at least at their more insanely cheap prices ($200ish for the Dell, under $300 for the NEC). They're so cheap, as long as there isn't awful colour uniformity, conspicuous dead pixels, etc, you're getting a great deal. Also both displays are sRGB so you needn't worry about compensating for wide gamut colour.
The mid-price Dell U2410 and HP LP2475w are more problematic. They're relatively affordable, yes, but that also seems to translate into a greater proportion of dodgy panels than, say, the thousand-dollar NECs. Which perhaps is unavoidable at this price range. Yes, panel defects are usually LG.Display's fault, but to obtain IPS panels at these prices, Dell and HP probably agreed to accept a certain quality distribution, whereas NEC (and perhaps Apple) likely get 'first pick'. This is probably why Dell et al are refusing to replace certain uneven panels by claiming they are within spec.
Myself, I've not decided yet. I want to buy the Dell U2410 -- really prefer 16:10 to 16:9, but I worry about the wide gamut, as well as the dithering in sRGB mode. Yes, if one stays with the wide gamut modes, the dithering is avoided, but even if you make an appropriate colour profile to compensate for the wide gamut, many apps aren't able to read the profile, even as we enter the second decade of the 21st century.
If Dell doesn't provide an adequate fix for the sRGB dithering soon, I suspect I'll buy the NEC EA231WMi the next time it falls below $300. I'd regret the loss of the vertical pixels, but I would also be getting sRGB colour and a finer dot pitch.