A bunch of good options already listed. I would also consider the new Sig Tango6 4-24x50 or 5-30x56. It looks pretty promising with the leveling feature and an interesting reticle.
Currently looking in the same rough price range for a purchase a few months from now. Most have already been said but my main contenders not counting uso or nightforce are:
1. minox zp5 5-25 mr4
2. Sb pm 2 but thinking of waiting for lrr mil
3. vortex amg
4. steiner m5
pretty much in that order but still researching minox