Ok, I am in hong kong now and would like to buy something better than the kit lens to take pics with. I can get the Tamron new for $356USD or spend the extra dough and get a used L for $576USD. My question is, is it worth the premium? I currently have the kit lens and a 50mm. Looking to also obtain the 70-200mm f4, so the money saved will go towards that. EDIT: Also I found a place that carries the used 580Ex for the same price as a new 430Ex, should I just play it safe and get the 430ex or is the 580 a big uprgade?