BigBuck, Spend as much as you can afford. Another thing you would want to consider is the warranty. Does it offer a good warranty and would you have to send it over-seas for the warranty work if it needs it? Also is there a handeling fee associated with any warranty work? It's possible that if you needed warranty work done, the cost could exceed the price of 2 or 3 new scopes which many are finding out on extremely low cost scopes.
Just a heads up.
MO