« on: December 12, 2012, 09:15:27 PM »
I know you seem to have already made up your mind, but I feel I must chime in on the 100L.
It's an amazing lens, but you mention you will be doing primarily portraits with macro as a bonus. I used the 100L on the 7D for about 2 years, and while it was a fine lens, it was very often too tight for portraits, and I was very limited in how I could photograph my portraits. Sometimes I just couldn't get that far away from the people.
When I upgraded to the 5DIII, I fell in love with the lens as a portrait lens. It's absolutely amazing.
Finally, as someone else said, I would never, ever sell your 50 1.8. It's such a cheap lens, and it provides you with a low light option when needed. There will inevitably be times you need something wider than 100mm, need more bokeh, or just want something small and light, and I would highly recommend you keep your 50mm. Just my opinion.