What's the primary usage?
In order of my preference:
BenQ FP241W - Old and discontinued, you basically must order it directly from BenQ. Best of the bunch in my opinion.
Samsung 245T - Overall good, but some input lag from what I can remember.
Dell 2408WFP - Some ghosting issues, minor input lag from what I can remember. Behardware.com stated this monitor is not the best for gaming.
Gateway FHD2400 - Inexpensive. It uses a 6-bit TN panel which means limited viewing angles, possible image artifacts, less than acceptable color accuracy (for me), tendency for more backlight bleeding, and relatively poor black levels (amongst other). Should be adequate for most average users and gamers. Plus side (other than price) is the faster response time.