BTW, one more thing in favor of the Yongnuo speedlights… B&H Photo, one of the most reputable photo stores in the USA has just recently begun to stock Yongnuo products. That in itself says something about their reliability, since B&H wouldn’t stock something that they can’t recommend. If you do go with a Yongnuo product, definitely buy it through B&H, and they will take care of any problems if there are any.
It seems that they don’t actually have them in stock yet, according to their website, it will be another 2-4 weeks yet…