Which wireless adapter should I buy to gain advantage of N66U

I'm going to buy the ASUS N66U router. I have a desktop and I need a wireless adapter. I've looked at the ASUS PCE-N15, but I'm not sure if this is the best wireless adapter to gain advantage of the ASUS N66U. Would I be better off going USB or Ethernet or PCI express? I'm new to networking. What specs should I be comparing when I look for wireless adapters?

http://www.newegg.com/Product/Produc...82E16833320074