I've got myself in a bind to decide which flash unit to get. I like what I hear about both of these and both are good manufacturers of flashes. One one hand I have the Sigma EF-500 and on the other, I have the Sunpak PZ-5000AF. They both meet my needs and both are laid out very nice but there are the gives and takes for either so I thought I'd come to the forums to see if there are any of ya'll that have either one and if there are good/bad stories of either. Thanks as always.