4X would be wonderful but what about the following: First, I see very little comments regarding video for D4 (or D800). What does everyone say about this? Is it really necessary? Second, More pixels are wonderful too but not if you have to set the camera on a tripod like the D800 or have one of the most steady hands around. I'd settle for 21 or more MP if it will take tack sharp photos and still show as such when cropped. Third, got to keep that FPS rate. Conclusion: I'd go for the D4 now if it had at least 21MP. 16MP is just not enough resolution for $6K.