If you have a riflescope that has reliable adjustments, a solid point of aim, sufficient magnification for the task and presents a clear view of the target, getting a "better" one will not increase your scores. In essence, about the only thing a riflescope will do is subtract from your score by not performing properly. For F-class, when you get into the 30X range with solid adjustments, it's no longer the scope that's holding you back and you can get such a scope for around $1,000.
So why would people pay a lot more money for a scope that will not directly add points to your score at every outing? What a great question!
A few years back, I posted on this site, a report on my experience going from an NF NXS 12-42X56 to a March-X 5-50X56. I explained why I was looking for "better", what specs I was looking for and why, and what the end result was.
The bottom line was comfort. When you spend a lot of time looking through a riflescope, a better quality scope makes it a better experience than a lower quality scope. When you can see the target clearly, when you can place the tiny dot of the reticle surgically on the target, when you can just lie there and look and not get eye-strain, when you just can't wait to get behind that riflescope again and look through it; you will know that you have the right scope for you. That will make you enjoy the game even more and that may even enhance your performance.
I have been working on my setup on the line to where I have my spotting scope at my left eye and my riflescope at my right eye and I just transition back and forth looking at conditions and firing from that position. Still need a little more tweaking, but it's almost there.
So, you can read all the reviews that you want, you can ask for all the opinions that people are happy to provide, it all comes down to you and what you want to achieve and then coming up with a list of specifications for your equipment. With that in hand, you can decide what to buy, if anything, to achieve your goal.