I have a canon EF 100mm f/2.8 USM macro use it with my XTI. I love it.  At a link you can see some "sample" what I captured with a lens. I almost bought the 60 mm but I see it now it won't be enough for me and if I would of have an other thousand dollar to spend I would of buy a 180mm. But I am very happy with 100mm I can not put nothing againts it.

http://www.pbase.com/misstkphotography/macro_photos

seeya  Tunde