Dell U2311H. IPS panel, meaning accurate colors (when calibrated, of course), nice looking monitor, 1920x1080, $320 before shipping.
Here's a breakdown of the panel technologies:
TN: The cheapest and most common. Has the fastest response times, but does not support full 8-bit color. All modern TNs can fake it through dithering, but if accurate color is at all important to you, stay away. Has terrible viewing angles (sitting in a normal viewing position, you can see color shift between the bottom and top of the screen. Yeah, it's that bad).
VA (MVA, PVA, S-PVA, etc.): Best black levels of all the three main panel types. Better colors (full 8-bit) and viewing angles than TN, but not as good as IPS. Not too many monitors use this nowadays.
IPS (H-IPS, e-IPS, S-IPS, etc.): Best color reproduction and viewing angles of all panel types. No color shift. However, it is usually the most expensive type. All professional monitors use this panel type. Slower response time than TN, although the consumer grade IPS monitors are still perfectly fast enough, even for FPSes (I use three HP ZR24w's and have no problems).