My experience with Nikon Monarch is not good. I purchased one several years ago and mounted it on a T/C Omega. On my first hunt with it, I took a fall and it got a pretty good wack, not extreme, the sort of thing you expect in the outdoors. When I checked the scope at the range the next day, it wasn't even on target at 25 yards. I sent it back to Nikon and it was supposedly repaired. I took it to the range and sighted it in with about 25 rounds fired. I decided to make a 1 click adjustment and something went haywire. The gun, which had been sighted about 1" high at 100 yards, wasn't even on target at 25 yards and could not be adjusted. Nikon replaced the scope. The new scope is on my 308 Winchester and it has not as yet been out on a hunt, but is sighted in for 100 yards.
My hunting scopes are now made by Burris. Optics are just as good as Nikon, but Burris has a Posilock feature on their Signature Select series. The springs on their Fullfield II series are extra heavy, to prevent what happened to my Nikon.
A salesman at Cabelas warned me that Nikon had a reputation for delicate scopes and he was right. I would go with either Burris or Leopold.