WiFi 802.11/ac PCIe supported adaptor

I'm looking for a replacemnt for my 802.11g WiFi PCIe adaptor card and want to replace it
with an 802.11ac adaptor.

Since I made very bad experiences with CURRENT and support of modest modern hardware
(Haswell CPU/Intel  7260 DualBand WiFi NIC), I'd like to ask here first.

I found this PCIe adaptor card attractive:

GigaByte Gigabyte GC-WB867D-I

I can not find ad hoc the WLAN chip used on that specific card, but maybe someone has
experiences with that litte board.

Thanks in advance,
Oliver