Fantastic reply, thank you so much for taking the time to write that out. A lot to thin about.
I hadn't considered the possibility of setting up the new router in the office as the primary router then having the one sat by the modem as the node.
Thanks again!
I currently have an ASUS RT-AC66U_B1 router connected directly to my modem. It performs great and reaches most of my house for WiFi.
However I'm setting up a new office room at the other end of my house which in which I'll also be using for VR.
The VR requires me to have a 5ghz router connected...