I have a AT&T fiber and currently using a old Apple AirPort Time Capsule on channel 161 (5Ghz, 80 MHz). I consistently get around 340-410Mbps on CloudFlare speed test. I am wondering if upgrading to a Ubiquity UniFi nanoHD will provide additional wireless bandwidth worth the price upgrade? If I can double my speed (680 - 820Mbps) that would be worth it for me. Thanks.
While it is possible to get faster WiFI speeds it really depends on if your system can receive those speed wirelessly and that you have a WiFi AP that can line up the speed with it. If you really want speed, run a network cable.