6x is a good workman-like mag. Very versatile for accurate shooting out to 200 yards comfortably.
10 X is nice for technical shooting as the maths is very simple.
A zoom that crosses 10 X is useful.. like 4_12 or 4_16.
Would pay for the quality of glass in a 6x rather than the gizmos on a zoom.
A nice crisp and bright sight picture for me..