I am appealing to MacRumors readers for help choosing a new wi-fi system for a large, three-floor house. My current system is anchored by an AirPort Extreme where the cable enters the house on the middle floor; I also have a built-in Enterprise-grade wi-fi access point connected by Ethernet on the third floor, an AirPort Express connected by Ethernet on the bottom floor, and another AirPort Express connected wirelessly in the garage. My new system would keep the built-in router on the third floor, but would replace the AirPort devices (which are dying). We are *very* heavy internet users, so speed and reliability are extremely important; cost is less so (but I still don’t want to throw money away). Could I use a “mesh” system (such as Orbi or Eero) and still wire-in the third-floor access point and a wired access point on the bottom floor, or should I go with something else?