sigma 105mm os...macro vs canon 100mm L <moved>

Hey all,
I have been considering purchasing a macro lens and I have come across two options (listed above) that I think will work well for me. I mostly do portraiture but I would like the option of having a super sharp macro lens as well. I tried doing a search on the Sigma model but I came up fairly short here on the forum. is there a reason that I just don't see much in the way of reviews, or usage. I am strictly looking for some comparisons to the canon 100mm L.

thanks for the help

Sigma 105mm thread HERE

Canon 100mm thread HERE

In the future, the Macro discussion forum is HERE

Good Luck!

Moved you to the macro discussion.

I am sure both will be very sharp, both have OS/IS etc.

In the past Sigma have had compatibility issues with new bodies and needed firmware upgrades, though I suspect this is a very low probability issue here.

In general as one gets a camera system for the manufactures lenses I normally stick to Canon unless I have a reason not to (have not yet, the only temptation in the new Tamron 150-600mm because Canon do nothing like it and if they did it would cost a lot).

thank you for moving the thread!