Look at Bushnell Elite line of scopes. If you want to keep it inexpensive, try the 3200 Elite series. The least expensive that is very reliable would be the fixed power. I have a 3200 fixed 10X scope. It is very reliable. It tracks very well and the glass is decent. In fact Barrett puts the same scope on his 50 BMG and 416 rifles.
PS. I forgot to mention that the scope has target turrets that are easy to zero. The turret has one screw on top that you loosen up to re-zero and tighten down when you're done. Very simple to work with.