depends on what you are shooting I guess. I bought my 12-24mm last year and I sold it after few weeks. Now I am happy with a 2nd hand 17-55mm F/2,8, this lens is sharp, contrasty and the color produced is superb (too bad it is a DX lens). I find 12-24mm too wide and get bored with the surreal effect after a while. Personally, I think 12-24mm is not an easy lens to use.
Get a Nikon 17-55mm F/2,8, a 70-200 VR F/2,8 (or 70-210 F/4,0 if you prefer light weight, someone is selling on buy/sell) and a 85mm F/1,4 and you are almost done if you are shooting macro.
Get a Nikon 17-55mm F/2,8, a 70-200 VR F/2,8 (or 70-210 F/4,0 if you prefer light weight, someone is selling on buy/sell) and a 85mm F/1,4 and you are almost done if you are shooting macro.