Well, I think in future well see a lot more G-lenses. Not because they are cheaper, but because the new bodies dont need an aperture ring anymore. And there will be even some G-lenses with metal mount (the new AF-S VR 70-200 G for example). Just keep in mind that you cant really use old manual focus lenses on the D100, and with normal AF lenses you set the aperture with the front dial - not with the aperture ring, so go for G-lenses, save some money. By the way, I would suggest buying the 24-85mm 2,8-4 IF ED, not the 24-85 mm G, because the former is macro capable up to a ratio of 1:2.