I like Leupold, the good thing is you can purchase a used scope and it is covered.
As above, we need to know what type of shooting you will be doing, and rifle.
Now if this is going on a hunting rifle, do you really need 4-12? Do you really need 50mm?
If you are hunting on the prairie then, a 4-12x50 will help with those longer shots and close to dusk shooting. In the woods the high mag will be a pain in the ass. The field of view will horrible, also the 50mm obj will cause you to mount the scope higher and you will need a higher comb on your stock for a good cheek weld.
Now from VX1/VX2 up to VX3 you are getting better glass and coatings, The VX3 has a neat range ring that allows you to bracket a deer and get a decent range estimation.
Personally I like a lower mag scope, but if you are scoping a new Remington, Winchester, savage sporting rifle, a VX3 2.5-8 with CDS will cover most hunting scenarios. Scope it once and be done.