anyone knows which brand provide PCI/Mini PCI-Express Dual Band Wireless N for PC Motherboard?

looking to upgrade to wireless N w/ Airport Extreme Base Station but interested to use 5GHz as well. Currently only 2.4GHz wireless N available in PCI / PCI-e interface that i know of.

TL-WN951N (PCI Interface)
http://www.tp-link.com/products/product_des.asp?id=137

D-Link DWA-556 Xtreme N (Edit: I think this is PCI-Express 1x interface available in common PC motherboard nowadays, can we use this port in hack OSX86?)
http://www.dlink.com/products/?pid=549&sec=0

i think both use Atheros 5008 chipset, but only runs @ 2.4GHz

Currently using TP-Link TL-WN651G (recognised as native airport through the help available from this forum). Edit: Purpose of upgrade to stream content to AppleTV. current wireless bandwidth not enough to stream content, too far from PC - Router - AppleTV. Current data transfer rate range between 100-600Kbps.

thanks