It is allways best to get the best scope you can afford. That said the other weak link in the chain, are the rings and bases. Do not, do not, do not, go cheap here. I personally like steel Warne brand rings and bases. You should be able to find them on the net and at Cabelas. You also want your scope to be bolted in with 4 bolts or screws per ring. I also recommend having a gun shop mount it to torque specification for you. This means probably staying away from Wally World and going to a gun shop. Usually if you buy a scope from a gun shop they will mount it for free.
Stick to the Warne equiptment, you will not be sorry.
When it comes to scopes, rings and bases you generally get what you pay for. thats my 02.