which wireless adapter should I get

[ice]

:confused: which wireless adapter should I get for my N router.

This connects to the pci-express slot.
http://www.newegg.com/Product/Product.aspx?Item=N82E16833124069

This connects to the usb ports
http://www.newegg.com/Product/Product.aspx?Item=N82E16833124093

I want to get the usb one, but there have been bad reviews for both products. Which one do you recommend?