Originally posted by Ratmagiclady I presume that if a given thing is IPS, it'll proudly say so?
Like NaCl said there are basically three dominant LCD technologies - TN, PVA, and IPS - TN is fastest but has poorest viewing angles and worst colors and is produced by several suppliers, IPS is the slowest but has the best viewing angles and best color reproduction, and PVA is a compromise.
Unfortunately not always, a lot of monitor brands source their panels from multiple suppliers and they sometimes change the supplier within the production life of the same model. Dell used to be bad about this, they used to start producing their "ultrasharp" monitors with IPS panels then change the panel to PVA midway though the production and still sell it with the same name.
A good indicator that it is IPS is if they advertise viewing angles of 178/178 (horizontal/vertical). TN will be 170/160 and PVA will be 176/176. Although, sony advertises their TVs as 178/178 even though they are PVA so even this is no longer a 100% reliable indicator.
The manufacturers for IPS are LG, Phillips, Hitachi, and Panasonic and they use them pretty reliably in all of their televisions but it is harder to tell when shopping for a computer monitor because they mostly act as suppliers not direct vendors. LG is in the monitor business but it looks like they are using non-IPS panels on their current lineup. So if resolution isn't a high priority looking for an LCD TV from one of them on clearance might be a good route. In a computer monitor I like very high resolution and pixel density.
If I were in the market for a monitor right now, I would go for the HP and check out how bad the buzz is. It has a 10 bits per color so it produces 99% of adobe color gamut. If price were a major constraint I would go for the 23" NEC or like I said, a clearance TV.