Mike Sita

Love the Z90 as a sun gun and occasional hair light on a talking head. It's come in very useful numerous times. I've played with the is3 in B&H and its got some decent punch but I couldn't really tell in the store how the shadows were, I'd suspect you're right about the multiple shadow issue though. However, I do own and use constantly kino flos celeb 200 and I love it. It's petty similar to the is3 but doesn't have all the colors. What it does have though is no color shift when dimming and no shadow issues.