Best affordable wifi card/usb?

Hi, I am currently in the process of purchasing the parts for [my build] (http://pcpartpicker.com/list/cjQwcc), and I was wondering which wifi card/usb you all would recommend. I have look at reviews for a few, and some people say "it works great" and then others say "it doesn't work at all". Sadly, I don't think I am able to move my router to my room and have wired connection, so that's a bummer. Which ones would you guys recommend? Please try to keep them $30 or less, as I am building on somewhat of a budget. Thanks!