Hi chaps, I'm after your informed opinions once again. Lets say that I were to hypothetically pick up a D7000, what in your opinions would be the best lens one could use for portraiture with this cam?

Would the 24-70mm f2.8 be the best option as it would be on a FF body, or is there a DX equivalent in the Nikon or other brand's lineup (say a high quality 18-55mm) that I haven't yet come across?