I am probably one of few still holding on 17-55 for D400 in the future. I sometimes uses it with an 1.4X TC on D800. I like the weight and size of 17-55 on either D300 or D 800. The combo just feels right in my hand. I know I should replace it with 24-70 but I spent the money on 16-35VR and 50/1.4g, and I am still enjoying them on D800 to think about anything else. Picasso said it marvelously - you find pleasure in illusion but happiness in reality. I am very happy with my mid range gears while waiting for D400 silently. Nikon, have you heard me?