This is my order of preference because it is what I own in my collection. The order preference is based on glass quality 1st, reliability a very close second and weight third. I compared glass using an unscientific method by looking at wire mesh on quail house at 420yards in low light conditions at high magnification. This is my preference via my eye:
1. Zeiss Diavari
2. Schmidt and Bender (mine are 2+ years old)
3. Swarovski Z6i (If weight is a concern, moves to #1 position), Swarovski X5i
4. Leupold VX6HD (I do not mess with turrets in hunting applications and use holdovers/reticle system) or VX7
5. Nightforce NXS, ATACR
6. Steiner or Trijicon Accupoint
Any new product lines that have been released inside the 12-month mark can not give any feedback. I am at a point that I have optics sitting in idle that I should part with.