Having the same dilemma myself. I don't really need any of the additional features of the 580 which just leaves the power issue. Now I wouldn't be using it for any commercial purposes or huge groups of people, just casual stuff in relatively small rooms but would be looking to use a diffuser such as a Stofen or Lightsphere and/or bounce it off of ceilings or walls.
Does the 430 have enough power for this? I see a lot of posts saying the extra power of the 580 is desirable/needed if you're looking to diffuse or bounce but is this just for bigger areas? Cost is a major issue so don't want to be spending the extra on the 580 unnecessarily yet don't want to find I can't use a diffuser or bounce on the 430.
Does the 430 have enough power for this? I see a lot of posts saying the extra power of the 580 is desirable/needed if you're looking to diffuse or bounce but is this just for bigger areas? Cost is a major issue so don't want to be spending the extra on the 580 unnecessarily yet don't want to find I can't use a diffuser or bounce on the 430.