Recommendations of wireless network adapters

Hey AWESOME people of the world. i am building my first gaming pc. and i was looking for a wireless network adapter for around $20-30. and would it be better to get a pci or usb 2 one. .This is my planned build. i just plan to do some casual gaming. 

Thanks in advance for every ones help

Permalink in the top left corner of PcPartPicker, please!

I like PCI cards better, as my own experience with USB WLan cards have been pretty crappy for gaming.  Most people will say they have the same performance, though.