Laptop Selection help please!?

I am looking for a laptop that can run games without much of a problem. Not really looking for a laptop that can run everything at the highest settings but medium settings is fine with me. I was looking at http://us.acer.com/ac/en/US/content/model/LX.RB902.089 . But I have no clue what is really classified as good when it comes to graphics cards. Could anyone help me find something? My budget is tight ($700 or less). Any suggestions?