Amazing shot Equilution
Very nicely done, a great macro photograph indeed.
@Simplyjoed: If you're getting a 105mm lens with manual focus on a cheaper price then you should definitely go for the manual focus lens, as most of the work you'll be doing with a macro lens would be done better by the manual focus one because macro photos usually requires focus on a specific area which will become quite difficult to achieve using an auto focus lens.
May I suggest that IF you are REALLY interested in macro photography, and have some extra money to spend too, then buy a teleconverter and a macro diopter as well. A macro diopter on top on a 105mm macro lens on top of a teleconverter might go a bit far
but it will surely give you great macro capibilities.
Hope this helps.