Rethinking my first purchase to be. I encountered a hummingbird the other day, my 18-55 was not nearly long enough to get me even a decent focus on him. That said, I'm gonna put-off the 60mm Macro for favor of an xx-200mm of some sort. Could I get some input on which is what I would be most happy with? I've read some good things about a Quantaray 18-200. Any help would be great!!