Get a model that uses S-IPS panel or atleast MVA/PVA panel. Avoid the ones with the TN panel since color reproduction and viewing angles are poorer on those.
I saw a Philips 24" S-IPS monitor for only about SG$740 at Sim Lim last weekend, but the drawback was that it had only 2 inputs- DVI and VGA. No HDMI or component. If you can live with this, it might be worth checking out.
whatever it is, make sure you know the exchange policy for dead pixels and so on. Most manufacturers call it a result of the manufacture process and therefore not a defect.