Did you sell the D300? If so, and you are not going to replace it with another Dx, I would suggest getting the 24-70, for about the same field of view but better optics. The 17-55 is still worth a major portion of its new cost but with so many people moving to FX, the price is the highest is will likely be right now. I have both lenses and feel the 24-70 is a better lens on either DX or FX, as long as I have something wider then 24mm(36 on DX) in the bag.
We are is a similar position with 17-55 and 85 1.4D. Even on the D7000, I prefer the FX lenses. I have not mounted the 17-55 for probably a year but I use the 85 a lot now that I am getting more out of it on the D800. Like you, I have been thinking of moving to the 1.4G, mostly for corner performance. I just have a hard time selling anything. NAS is a cruel affliction....

Stan
St Petersburg Russia

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