Since you are used to manual focus lenses, I would recommend some sort of Zeiss 35mm lens for Cannon. I would expect that the 35mm f/1.4 Distagon stopped down will preform as good as, if not better then the 35mm f/2 Distagon (if you really care about the subtleties, which I am too lazy to look up even though I have an account, go to digloyd and check out his extensive reviews of these two.) They both should be superior to the Canon 35mm f/1.4L which, based on your other lenses, I would assume would be your comparative Cannon choice. The Zeiss 35mm f/2. is quite smaller, if that is any consideration.... also whether you want autofocus or not is kind of a big question there.