I've got the 100 mm F2.8 macro and it's an excellent lens. You will love it in the new world it will open up for you. If I was to buy now, I would consider the 100 mm F2.8 IS L macro instead. When you are shooting close up, especially trying to line up that small critter and manually focus on it, the IS could be helpful. I've learned to really appreciate the IS on other lenses and this is something to consider for macro use.