I have spent lots of effort , time and money trying to get a 70-200 I would be happy with
Up to that point my other 2.8 was the Nikon 24-70 , body was a D700
First was a used Tokina 70-200 2.8 , then came a used Sigma 70-200
Both lenses did the job for about 4 months I had them and I was very happy . Luckly sold them for only slight loss
My mistake was pixel peeping @ 70mm to compare to my 24-70
Decided to spend a bit more and went to a used but like new Nikon 80-200 . Awesome lense....best so far but being a D lense focus was noticeably slower
Came across a nice used 70-200 VRI . Loved this lens and figured it was a keeper .
Didn't care that corners are bit soft on FF since most of my pics , the framing / subject / important details weren't in corner
All was good until I picked up a D810 body . Found myself a cropping fool to make multiple pictures from one exposure . All of a sudden , corner sharpness wasn't as good as center of frame
Sigh...., saved my pennies and picked up a 70-200 VRII
Knowing what I know know, I should have dove into a 70-200 VRI or VRII without wasting time and money on the Tokina / Sigma / 80-200
IMO you should save up for a used 70-200
Surprisingly, the lens that surprises me was a Tamron 70-300 Di VC . I picked one up as a travel lens after trying the Nikon 70-300
The VC works amazingly well in this lens and I was very impressed with sharpness ( compared it to my 70-200 and 24-700 )