so much missing info
5GHz channel support
graph of all the collected data
how well does the router support moving clients between 2.4 and 5GHz as required by signal strength?
for routers with USB ports what filesystems do they support? What kind of speed do you get accessing the disk?
alternate firmware support, the buffalo comes with dd-wrt but do any of these other boxes support it?
These things aside though, this is quite a good round up, I think the screenshots of the UIs tell you a lot about the products. Interesting that the reviewer didn't like the TP-link interface when it's not far removed from most of the others.
Of course the real issue here is that 5GHz just isn't worth it for most people. My 2.4GHz N router happily gets to the 10-15Mbps my broadband provides, despite me being able to see 15 other routers in my local area. It runs dd-wrt and cost £30. When I need something more reliable or faster than 2.4GHz wifi I use a cable.