I used a few from this forum (color profiles), but as I played around, I found that it was more of a personal prefernce. I made sure I had a good quality backgound (
www.wincustomize.com ?)to look at to see how the changes varied and then settled on something that I liked.
I have the Dell 20.1" widescreen that I have setup real nice so I decided to use the same wallpaper. At first the XPS screen looked washed and dull, but then I got into the NVidia color correction setting and was able to match it up fairly well.
Just play with it and find something you like and stick with it.