Blurry/aliased text on external LCD in Lion

I have an external LCD hooked up to my MacBook Pro 5,5 running Lion. I have major aliasing on the external monitor in every application. Using the commonly recommended defaults -currentHost write -globalDomain AppleFontSmoothing -int x (with any value 0-4) has no effect on restarting applications or rebooting. The monitor is running at its native resolution, 1440x900, although I had to use SwitchResX to get OS X to recognize this resolution.

Any suggestions?

As its on a VGA connection, it may not be aliasing or the resolution, but could be the phase of the monitor. It should have settings on he monitor itself to auto configure or manually adjust things like this. Do you have the ability to reset the monitor via an OSD?