Sorry, I didn't know that the 2475 has issues. For so long I was waiting for widely available 24" H-IPS that I took my expectations for granted...
The review at Tftcentral doesn't seem to be negative however, quoting and link: http://www.tftcentral.co.uk/reviews/hp_lp2475w.htm
Overall I was very impressed by the performance of the LP2475W. While default colour accuracy was pretty poor, once calibrated the screen offered the best colour results we have seen in our reviews. Black depth was excellent for an IPS matrix, and even out-did many PVA matrices we have tested! These were very positive improvements for IPS technology, and hopefully this is a sign of things to come. The screens massive range of ergonomic adjustments and interfaces was also nice to see, and the HP had a very "Dell feel" in terms of finish, functionality and features. Responsiveness was very good, but there was some slight RTC overshoot which caused some dark artefacts in practice. However, the decent pixel responsivenss, combined with pretty good input lag, could make this a good screen for gamers, as well as those wanting an excellent all round performer. If you want a 24" monitor, this is a hard one to beat in my opinion. Given the extreme lack of IPS in this sector, HP are probably on to a winner here.
About the HP 2408h, if the review at Prad says it's noisy, then it's quite noisy, the Prad reviewers aren't very sensitive.