Here;s the thing buffoalo will I be satisfied with it you thing or will I regret not geting the higher power
Theoretically, and under good conditions with high quality glass, you can shoot at some serious ranges with not too much power.
But, is game all you will shoot with the gun and can you say that you absolutely will never shoot past 700 yards? The reason I ask is that I may not shoot big game at super long ranges but I shoot a lot at paper, steel and rocks out to 2000 yards and more just playing around and practicing. Sure makes the 500-1000 yards shots a lot easier.
I'd bet you'll find that you will start stretching it and find that a little more power might come in handy. What about if you can only see part of a yote at 700 yards and have to shoot through a small opening, something that would be easier if you had just a little more power.
At a spot where we shoot there is steel at up to 800 yards and paper up to 500. I've shot the 800 yard stuff on 5.5x with my NF but that is with glass that is just about as good as it gets.
I've always felt that I can always turn it down but I can't turn it up where there is no more "up".
Just a personal opinion. You'll also find that with power comes size and weight so that could be a determining factor also.
Jud don't go out and buy an 'el cheapo scope and then complain because you got what you paid for. Quality cost money but that scope is what you will look through for every shot you take with that rifle no matter what the size of the target is. I've always preferred to be able to shoot at a small dot on a target as opposed to just centering the crosshairs on the whole target.
GOOD GLASS in the max range of 14-15 power will serve you fine out to the ranges you mentioned. You just need to determine if there would ever be a time when more would be nice. If there isn't that time, then go with the lower power and be happy.
If you can, look through some different scopes and compare them to see what gives you the best resolution and clarity at different powers.