I'm pretty set on getting an external flash over the holidays, especially with the 30% off on ebay and am a bit stuck on which of these to get. Well, actually I'm leaning more and more towards the 580ex because of features/controls but I'm still undecided. The 580ex II is out of my price range and, with a non sealed camera with non sealed lenses I really don't need a weather sealed flash. The Metz is by far the cheapest of the bunch but I have had a lot of trouble finding any comparisons between it and the other two.
Is there anything the 430exII has over the 580ex? Does the 580's extra weight have a very noticable impact?
How does the Metz stack up to the rest?
Also, I haven't really looked into Sigma flashes, I've heard some negative things about them and decided that they might not be worth considering. Are there any I should look into?
Thanks for the help.