Thank you for your in-depth review thiggins.
I have both the Netgear R7000 and the Linksys EA6900 and in my "real world" environment, the Linksys performs better in wired and 5GHz Wifi. Range is better on the Netgear but in my small condo that's somewhat irrelevant as I get plenty of range from the EA6900.
I purchased both routers to test it out in my set-up and it looks like I'm keeping the Linksys and sending back the Nighthawk.