A while back I sold my Tamron 200-500 because I just wasn't using it. To replace/augment my 70-200 4L I just picked up a new 100-400L IS. Now I can cover 12-400 with only 3 lens so I'm less likely to leave one at home.
Pardon the quality, I only have one real camera:
Hand held at 400mm, f/5.6 1/80
Pardon the quality, I only have one real camera:

Hand held at 400mm, f/5.6 1/80
