Hi all. I want to use flash, and have a lot to learn about it. One thing I'm pretty sure about is that I want to hand-hold my flash rather than mounting it directly on top of my camera. What remote trigger system do you recommend? I would prefer something wireless - in the 1980s I worked with a cord, but would prefer not having to do that again. I own a Speedlight 580 EX and a 220 EX, and will be working with a Canon 5D or a D60.