I'm a 25+ year Leupold fan. I have a 3x9 Vari X II that has not moved,fogged or failed in those 25 years. I have a 3.5X10 Vari X III that is my favorite on a .270 Remington 700AS that is about 20 years old with no issues. I have a 4.5X14 on a 22-250 and a new 6.5X20 Mark X on a .223.
I had a 6.5X20 vari X III on a 300 win mag that was just awesome for long shots. It got too kicking me too much so I sold it.
I have buddies who brag on their Schmidt and Benders, Swarovski's, Zeiss etc that cost 2-3 x's more that aren't any better than my Leupolds.
More magnification is better!!! Slap a 6.5X20 on it and bust em out as far as you can see.