pfSense for the routing part (and many other features not found in consumer Wi-fi routers) is very good, but is using it for Wi-Fi such a good idea ? The mantra in the pfSense forums is not to hassle with Wi-Fi, as it is a big pita.
Moreover, are there any AC cards supported? Based on the list provided by them[0] and info on the forums there aren't?
pfSense is FreeBSD based right? If so, then no, there is no AC support at all in most of the BSD operating systems out there. AC is a pretty big fundamental difference from bgn. There are devs working to support it, but anything out there is likely to be alpha/beta state right now.
