There are many good scopes on the market that will satisfy your needs but if your not in a hurry and don't need the scope right away then I'd wait. Save your money and get something that will fufill your needs and that you will be happy with over the years. If you double your budget / save the extra money then you will be in a better class of scope that will more than do what you want it to do.
Buy quality and cry only once!
The caliber that you are shooting is more than enough to shoot the ranges that you are wanting to shoot and then some. If you have quality glass and your marksmanship skills are honed then you should be able to make the shots that you desire to the ranges that you described and beyond.
For example, I took my fathers old Rem 7mm Mag and put quality glass on it. This is just a sporter rifle with a wooden stock purchased about 1968. The rifle shot a 5 round shot group @ 600 m (657 yards) that measured under 4 inches. Now, that rifle would not be able to sustain that gruop for a prolonged period due to the light barrel but for what the rifle is used for it is more than satisfactory.
Again, the key to it was taking off the old Weaver scope and putting on a far superior scope. Good marksmanship fundimentals were observed and it proved to be more accurate than I thought it would have been initially.
So, it all goes back to whether or not you are willing to save up some more cash for a quality scope or if you need it now.
Good luck
