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If it were me, my choice would be the 16-35 VR. I've own this lens and used it on both FF and DX. It is a very good lens minus the heavy distortion at the wide end. And like someone mentioned, it is perfect in the 20-30 mm focal length especially when stop down to f8-f11. But let me throw another option in the equation. If you're going to be using both the D800E and D7000, then why not consider the Tokina 11-16mm f/2.8 lens? Although the 16-35 was my "walk-around" lens on the D7K, it may or may not be wide enough for what you're going to be using it for.