Personally I do not think that super mag scopes make you shoot any more accurately. And they are more expensive. Cheaper high mag scopes will have poor glass with low light transmission and that you don not want.
I shoot to 1000 yards with a 25x high quality scope and will not be changing it. Use a 4x scope at 25 yards - just fine.
So go for quality not magnification is my advice.
Cant go wrong with Hawke for value for money. Not cool, but pretty solid.