The buckmaster will be no good for you with that reticule. It will match the trajectory at some yardages of coarse. But will it match up at the yardages you need? Let's assume the sight in is 100 yards, then the second 128, then the 3rds 144 and so on. Will be kind of hard I imagine to remember where the reticules intersect if it is not your primary hunting rifle.

Between the Omega and Leuopold you have to figure which is best for you. The omega (92% light transmition) is brighter than a vx-1(82-87%) or vx-2(85-87%) not to mention cheaper. But leuopold has the no fault warranty. Nikon has a limited warranty which does not cover what they consider abuse. Leuopold claims reticule to 300, omega to 250. Omega does have a 1.65-5x36 that is within 2 ft of luopolds field of view with the 2-7. So between the two you have pluses and minuses.
Good luck.