WiFi router for small business

I apologize if this is the wrong sub (if so, please kindly direct me to an appropriate sub).

My small business is surrounded by a couple dozen other WiFi sources, and seems to be the cause of my devices routinely connecting/disconnecting throughout the day. These interruptions usually last just 15-30 seconds.

We currently have Fiber Optic through Century Link business internet. We have about 10 devices connected. Our devices include Buffalo BS-GU2008, Firebox T10, and Watchguard AP100.

Will newer devices such as a Netgear Nighthawk help with stability?

Thanks!