The MSI X99S GAMING 9 AC motherboard is built for the Haswell-E architecture, and Morry did a review of it just a couple of week ago. He liked it, giving it a gold award. Now MSI has released a new model, the X99S GAMING 9 ACK, which is basically identical except for its wireless adapter. While the original AC-variant had Intel 802.11ac with dual antennas, the ACK comes with Qualcomm Killer-branded 802.11ac.
Again, for the rest of the motherboard, I will refer you to Morry's review. The only real difference is the Killer NIC and Wireless-AC combo, which is actually more than it seems. If I understand it correctly, "Smart Teaming" will monitor the specific applications using the network and split them between LAN and WiFi, with the more latency-dependent programs getting the wired connection. In theory, this is interesting except that both streams would need to merge in order to get out the internet, which will be your bottleneck. On the other hand, if this works with multiple internet connections, then I could see a use case. For instance, someone has a solid DSL connection alongside their high-bandwidth Cable ISP.
Or, of course, that could not work at all and the outbound internet will, in fact, be your bottleneck.
Pricing and availability is also not available. You can find the original X99S GAMING 9, with the Intel wireless network controller, for about $405. An upgraded wireless adapter should not increase the cost much at all.