The simple answer is, there isnt a "whats best", the question you should be answering yourself, is whats best for me.
Ask whats best on here or anywhere and you'll get a myriad of replies.
From my own experience;
I shoot long range - out to and beyond 1000 yds
I compete (well try to) at F Class
I stalk quite a bit
I shoot vermin
I only use Schmidt Bender on my hunting / tactical competition rifles (which I use out to 1000 yds)
The max power I have is 16x
For F Class I use a NF 8-32 power, the clarity is not as good as S&B - if S&B made a scope with the features of the NF I want (at the time I bought it) I would only be using S&B
Personally, I would go to a local shoot and see what everyone else is using and ask to look through the scopes - then you get an idea of what YOUR brain and eye likes.
Then research on the internet the features you may need (power, reticule, ajustment etc)
Then go buy.