Just got new CPU, but no Wireless Card!!

[The Funky Llama]

So I just got my new Dell XPS 720 and it doesn't seem to have any sort of wireless card. I didn't see any option for wireless cards when I customized it, so I figured it was automatically included (Why doesn't dell have an option for wireless cards anymore???).

So it looks like I need some sort of wireless card or adapter. Can anyone recommend one? I see there are some simple adapters that you just plug into a USB port. Are these good?