I used to use DiplayFusion when I had my laptop set up with another monitor, but now when it's docked I just use the screen, so I don't need it anymore. Great program, and you don't need it running unless you want to change your wallpapers.
As for Samurize, I haven't tried it. Right now I am using
Rainmeter to show my basic stats, but I might switch since I hate having to move around my stat widgets every time I take my laptop with me (monitor has different resolution, so it moves things).