Hard to judge for some one else, but I photo about the same, flowers, weeds,
and wildlife. I have an 80/400- and a couple others. Was sorry to read several unfavorable reviews on the 24/120 VR ? Any way, I have picked the 70/200 2.8 for my next lens-- It will run you a bit more though. The 17/35 will come after that- maybe. all depends on what they put out. I still have a case on about not being able to use my 18/200 on the D700 to its full advantage.--
It works on the D 80 though.
I have a 70/300, but it isn't 2,8, and it Does make a difference , sometimes.