I'm a complete n00b when it comes to anything outside the realm of natural-light photography, so I was wondering if anyone had any thoughts regarding any of these three lenses I'm looking for? I'll be using it along with my 20d, and mostly for portaits, weddings (hopefully), and everyday use. Here's my thoughts so far, any more insight would be great!
Canon 430EX: I would be getting it new, and it seems like it works pretty seamlessly with the 20d, but I'm wonding if the 420 will do just as well.
Canon 420EX: I can buy it used for $150. Is that a good price? Is is worth saving the extra $100 the 430EX would cost and putting it toward reflectors and such?
Sigma 530 DG Super: I like that there seems to be more control options and that it has a bit more power, but is it worth it? Any experience with this on a Canon? What will the differenes be between this and a Canon flash?
I know the 580EX is the way to go, but I don't know if I need it or want to pay the extra premium. Thanks so much, and sorry this is so long winded!