Earlier this year I sold all three if my Leupold Mk4 4.5-14 MilDot, three Trijicon TR24, one US Optics SN4, one Leupold VX3 1.75-6, and one Trijicon TA31 ACOG.
The Leupold's just weren't as clear as I wanted, the TR24s aren't strong enough to withstand SCAR17 recoil, and the USO was heavy and battery dependent.
I would recommend the ACOG and USO. I would like to try a NF, but have only looked thru some - haven't "used" one yet.