I just bought two 430ex flashes(at a really really really realllly good deal), and I was considering either using the ST-E2 or a 580ex to control them. My setup will be for off-camera flash purposes. The price range for a ST-E2 and a 580ex isn't that significant ($185(new) vs $275(used 580ex)). I've heard the 580ex is pretty bulky on camera, while the ST-E2 makes the camera a bit more "portable". Is there a way to make the 580ex to function just as a controller to the slave flashes? Cause if so, then I probably could live without an ST-E2 . Another reason why I've opted for the 580ex/ST-E2 cause I'd like to keep it ETTL. Other than range and master-to-slave visibility, what would the advantage of having Pocket Wizards be?