Now that I think about it I guess you can use a 580ex to make a pic similar to Mr. Setters image where you just expose the overall picture darker and then use the 1 or 2 580's as fill flashes. I've done that before but I guess what I'm trying to say is for the price of the 580 II you can buy a 1600 series monolights and still come out ahead with major power benefits. I know you most likely want to just work with what you have but for people just starting out to build a good lighting kit the monolights are the best deal going.