Advice for buying mini pcie wireless card (athk9)

[Benoît]

Hi
I have one laptop and one pc ( I would like to use it as my home AP with 
Hostapd ) but both are provided with Intel 7260 and need Iwlwifi but I 
am under Parabola and I need free source.
I know atheros 802.11n is a good option thanks to athk9

What you would recommend to buy? Which model and chipset is working the 
best?
Many thanks for your advices

Belette