>>Unless you can pick up a mint used 14-24, I would wait until you can. The 10-24 DX is great on the D90 but the resale value is terrible. > Quote>Maybe pick up a used 10-24 and then when you move to FX, there's not that much of a loss....Quote<<<
I would rather "invest" in the 14-24 FX than insure a "loss" with the 10-24 DX. Besides, the image quality of this FX lens is that much better. So, if possible, go to a camera store and compare them on your D90.