didn't want to post new thread, but i just got my 2493 today, and im also having troubles calibrating this monitor.
If anyone wants to share their settings it'd be greatly appreciated.
Here are my current settings. Keep in mind I use a Huey Pro to calibrate it, but the settings were fine before I started using the Huey. I use it mostly in the evening, so lighting is low or off. This might be a little on the dark side for daytime use. The Huey will adjust for lighting conditions at a user defined time interval. Bump the brightness up a bit if you use it in a well lit room. If I recall, my only adjustments out of the box are brightness and sharpness(old eyes).
brightness 20
contrast 75
color tone normal
color control all set to 50
color effect off
gamma mode 1