Thanks for the comments. As far as the 4000ED is concerned, I love this thing, Ive been using it since last summer. The ICE is great on dust, and scratches. Ive used it to remove those lovely scratches that one hour labs tend to leave across the whole role. The ROC works fairly well. Helped to bring some usability to underexposed concert shots. But the GEM, well it tends to make an image to soft, in my opinion.