that lens will be a while off for me yet , cant wait to get a hold of a d500 i think a good upgrade from the d7100, not so sure about the upgrade from the d7200 but as i mentioned maybe you dont really need the holy trinity of lenses when others are very very good at a quarter the price , i think they are way to expensive , i just shot a wedding with the 7100 and godox flash , and it worked out better then a lot of so called pro weddings shots ive seen , given the conditions i was very happy , not sure how much better high iso will be on d500 v d7100 i dont like to go over 800 but will push 1600 tops so maybe only one stop or so i think
if you havent done so already do yourself a favor and some of the angry photographers utube vids on lenses , he repaired them and has worked in and around cameras , glasses etc for a long time , he owns about 200 lenses so he knows what hes on about im sure
i was going to purchase the 24-120 but he believes it sucks compared to the 24-85g vr , he also i thinks its a sharper lens then the 24-70 , havent used it yet though , any distortion is so easily fixed in lr , definitely the way im going
nikon d500 , 70-300g , 24-85g for australain 3600 , hopefully a little cheaper by the time im ready , probably around three more months or so
good luck with your decision its dam hard i know , nikon 105mm 2.8 i love that lens and glad i bought it