I have never owned a Leapold, so not much help to you there.
I moved from my initial purchase of a Lynx Tactical 3.5 - 10 X 44 to a Nightforce NXS 5.5 - 22 X 50. I decided the difference between 50 and 56 objective was not enough to worry about for me.
I love the Nightforce and compared it with the Leapold Tactical 4 models - personal preference is the Nightforce by far, the glass is supurb.
At my club I've had Leapold owners look through the Nightforce and are amazed by what they can see out there