Men, I am sold on Leupolds so my question will pertain to them.

I have a Weatherby Mark V in .257 Wby. and I am down to a coin toss between a VX3 4.5 X 14 or Vx2 6 X 18 either having CDS turrets. I would like the opinion of Western antelope and deer hunters on the best fit.

I hunted the west three times with a 3.5 X 10 and now am looking the right scope for the longer shots.
Is the 14 enough power on the top end?
Thanks