What is your budget? How much money are you willing to spend?
For lower priced scopes, the most common recomendations are Bushnell Banner and Trophy. I also like Sightron S1 series very much.
Another thing is that you probably want something along the lines of a 3-9x40 configuration. There will be more variety and you'll get more for your money.
But basically, you need to figure out how much money you want to spend first. Once you know that you can figure out what gives you the most for you money. There are good buys in almost any price range, although I think that the cheapest decent scope that I know of is a Bushnell Trophy 3-9x40 that costs just under $100.