Help Me Choose: Wireless cards

Wireless cards enable you to connect to the world around you. The type of wireless card you choose impacts how fast and at what range you can connect your computer to the internet. 
XPS
 
Intel® Dual Band Wireless-AC 7260
Intel_DualUltra Wi-Fi. Ultra Features. Ultra Connected Experience

The Intel® Dual Band Wireless-AC 7260 802.11ac, dual band, 2x2 Wi-Fi + Bluetooth* adapter lets you move at the speed of life with faster speeds (up to 867 Mbps*), higher capacity, broader coverage and longer battery life. Combined with 4th Gen Intel® Core™ processors and exceptional Intel wireless innovations, the Intel® Dual Band Wireless-AC 7260 dramatically reshapes your connected experience at home, work or on the go.
Next-Gen 802.11ac  Wireless
More Speed
Better Coverage
Larger Capacity
802.11ac, Dual Band,80MHz, 2x2
Delivers dramatically faster Wi-Fi speeds (up to 867 Mbps*) than 802.11n, with more bandwidth per stream 433 Mbps), more capacity for more users (extended channel bonding 80MHz), broader coverage and better battery life (more data transmit efficiencies reduce power consumption).
Bluetooth 4.0* Smart Ready (Low Energy)Dual mode Bluetooth 4.0* connects to the newest low energy Bluetooth* products as well as your familiar devices, such as headsets, keyboard, mice and more.
Intel® Power Optimizer*Optimized power modes during periods of activity and inactivity to improve platform battery life for greater mobility and convenience. Dramatically lower power consumption than previous generation products.
HMC and M.2 Form FactorsSingle sided HMC and M.2 modules support multiple connectors for flexible system configuration and platform usages. The new M.2 form factor delivers a smaller, lower profile, more flexible form factor for thin-and-light Ultrabook™, notebook and tablet designs.