I think all the lenses you mention are comparable in quality - The extent they adjust the image may be different; some slightly wider than others.
Consider what you are going to want from the lens and the subjects you may be choosing. It's good to have wide angle but you will find using the cameras own lens will keep you busy for most of your trip. Close-up & macro is much easier to master in the beginning and allows you to develop strobe techniques and settings too quite quickly.
Laz posted some useful images last week he took in Florida take a look at what the camera can do.
Check out also how to look after the chosen lens in techniques & tips section. Make sure too, that it's tied onto something solid!
We look forwards to seeing those shots posted (good or bad) next month, good luck.