The 802.11 ac wlann standard used here is really the latest at the moment, but there are even faster routers with the same standard. What I find strange about this router is the somewhat slow Erhernet standard with 100 Mbps. Today, 1000mbit/s (Gigabitethernet) are common. So if a fast cable connection is important to you (perhaps you currently have your PC connected to the router via LAN), this might be the wrong router.
I can only say this much about the range: The (faster) 5GHz channel has a much shorter range than the 2.4GHz channel.
I hope this was of some help