M1 turrets are a plus, if you intend to hit with single shots at any distances.
Also, If you get a Mk4, you could order it through the custom shop(through planetoptics), so that it doesn't just fall off the end of an assembly line.
I've bought 4 or 5 like this(8.5x25), with the Alumina flip-ups and fine crosshairs(for GH hunting). Every scope tested perfect in MOA adjustments, and my reticles have so far been pumb to these adjustments.
But 'fine' crosshairs are too fine for anything but open field shooting. The day Leupold offers a med-fine crosshair, as I had installed by Premeir Reticles, I'll be sending most in for upgrade. You might inquire about a med-fine(it matches NF CH1). Your looking for .035-.045MOA of subtension at 25x. Their fine is ~.025moa...
Anyway, I wouldn't get a VariX-III, VX3, Vx-LR,,III or anything else with a 'V'.
Even Leupold can't keep up with all the model swapping there!